diff --git a/include/libgltf/libgltf.h b/include/libgltf/libgltf.h
index 14f650d..c5780a6 100644
--- a/include/libgltf/libgltf.h
+++ b/include/libgltf/libgltf.h
@@ -8,7 +8,7 @@
 
 #define LIBGLTF_MAJOR_VERSION    0
 #define LIBGLTF_MINOR_VERSION    1
-#define LIBGLTF_PATCH_VERSION    1
+#define LIBGLTF_PATCH_VERSION    2
 
 #if defined(UNICODE)
 typedef std::wstring                                        GLTFString;
@@ -35,7 +35,7 @@ namespace libgltf
         SGlTFProperty();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         std::shared_ptr<struct SExtras> extras;
         std::shared_ptr<struct SExtension> extensions;
@@ -49,7 +49,7 @@ namespace libgltf
         SGlTFChildofRootProperty();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The user-defined name of this object.
         GLTFString name;
@@ -64,7 +64,7 @@ namespace libgltf
         SMaterial();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The alpha cutoff value of the material.
         float alphaCutoff;
@@ -93,7 +93,7 @@ namespace libgltf
         SAsset();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The minimum glTF version that this asset targets.
         GLTFString minVersion;
@@ -114,7 +114,7 @@ namespace libgltf
         SSampler();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // s wrapping mode.
         int32_t wrapS;
@@ -135,7 +135,7 @@ namespace libgltf
         SAnimationSampler();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The index of an accessor containing keyframe input values, e.g., time.
         std::shared_ptr<struct SGlTFId> input;
@@ -154,7 +154,7 @@ namespace libgltf
         SExtras();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
     };
 
     /*!
@@ -166,7 +166,7 @@ namespace libgltf
         SScene();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The indices of each root node.
         std::vector<std::shared_ptr<struct SGlTFId>> nodes;
@@ -181,7 +181,7 @@ namespace libgltf
         SCameraPerspective();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The floating-point aspect ratio of the field of view.
         float aspectRatio;
@@ -202,7 +202,7 @@ namespace libgltf
         SBufferView();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The length of the bufferView in bytes.
         int32_t byteLength;
@@ -225,7 +225,7 @@ namespace libgltf
         STextureInfo();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The index of the texture.
         std::shared_ptr<struct SGlTFId> index;
@@ -241,7 +241,7 @@ namespace libgltf
         SMaterialNormalTextureInfo();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The scalar multiplier applied to each normal vector of the normal texture.
         float scale;
@@ -255,7 +255,7 @@ namespace libgltf
         SMaterialOcclusionTextureInfo();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // A scalar multiplier controlling the amount of occlusion applied.
         float strength;
@@ -270,7 +270,7 @@ namespace libgltf
         SAccessorSparseValues();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The index of the bufferView with sparse values. Referenced bufferView can't have ARRAY_BUFFER or ELEMENT_ARRAY_BUFFER target.
         std::shared_ptr<struct SGlTFId> bufferView;
@@ -287,7 +287,7 @@ namespace libgltf
         SAnimationChannelTarget();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The index of the node to target.
         std::shared_ptr<struct SGlTFId> node;
@@ -304,7 +304,7 @@ namespace libgltf
         SMesh();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // An array of primitives, each defining geometry to be rendered with a material.
         std::vector<std::shared_ptr<struct SMeshPrimitive>> primitives;
@@ -321,7 +321,7 @@ namespace libgltf
         SAccessorSparse();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // Number of entries stored in the sparse array.
         int32_t count;
@@ -340,7 +340,7 @@ namespace libgltf
         SMeshPrimitive();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The index of the accessor that contains the indices.
         std::shared_ptr<struct SGlTFId> indices;
@@ -363,7 +363,7 @@ namespace libgltf
         SKHR_materials_pbrSpecularGlossinessglTFextension();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The specular RGB color of the material.
         std::vector<float> specularFactor;
@@ -386,7 +386,7 @@ namespace libgltf
         SExtension();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // Manual code lines
         std::map<GLTFString, std::shared_ptr<struct SObject>> properties;
@@ -401,7 +401,7 @@ namespace libgltf
         SAnimationChannel();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The index of the node and TRS property to target.
         std::shared_ptr<struct SAnimationChannelTarget> target;
@@ -417,7 +417,7 @@ namespace libgltf
         SGlTFId();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         operator int32_t() const;
 
@@ -433,7 +433,7 @@ namespace libgltf
         SAccessorSparseIndices();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The indices data type.
         int32_t componentType;
@@ -452,7 +452,7 @@ namespace libgltf
         SNode();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The node's non-uniform scale, given as the scaling factors along the x, y, and z axes.
         std::vector<float> scale;
@@ -483,7 +483,7 @@ namespace libgltf
         SAnimation();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // An array of channels, each of which targets an animation's sampler at a node's property. Different channels of the same animation can't have equal targets.
         std::vector<std::shared_ptr<struct SAnimationChannel>> channels;
@@ -500,7 +500,7 @@ namespace libgltf
         SSkin();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // Indices of skeleton nodes, used as joints in this skin.
         std::vector<std::shared_ptr<struct SGlTFId>> joints;
@@ -519,7 +519,7 @@ namespace libgltf
         SMaterialPBRMetallicRoughness();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The roughness of the material.
         float roughnessFactor;
@@ -541,7 +541,7 @@ namespace libgltf
         SKHR_draco_mesh_compressionextension();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // A dictionary object, where each key corresponds to an attribute and its unique attribute id stored in the compressed geometry.
         std::map<GLTFString, std::shared_ptr<struct SGlTFId>> attributes;
@@ -558,7 +558,7 @@ namespace libgltf
         SCamera();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // Specifies if the camera uses a perspective or orthographic projection.
         GLTFString type;
@@ -577,7 +577,7 @@ namespace libgltf
         SImage();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The image's MIME type.
         GLTFString mimeType;
@@ -596,7 +596,7 @@ namespace libgltf
         STexture();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The index of the image used by this texture.
         std::shared_ptr<struct SGlTFId> source;
@@ -613,7 +613,7 @@ namespace libgltf
         SCameraOrthographic();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The floating-point horizontal magnification of the view. Must not be zero.
         float xmag;
@@ -634,7 +634,7 @@ namespace libgltf
         SBuffer();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The length of the buffer in bytes.
         int32_t byteLength;
@@ -651,7 +651,7 @@ namespace libgltf
         SAccessor();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // The number of attributes referenced by this accessor.
         int32_t count;
@@ -682,7 +682,7 @@ namespace libgltf
         SGlTF();
 
         // Check valid
-        virtual operator bool() const;
+        operator bool() const;
 
         // An array of textures.
         std::vector<std::shared_ptr<struct STexture>> textures;
diff --git a/tools/batch/glTF_2.0_schema.ini b/tools/batch/glTF_2.0_schema.ini
index 82dc7ef..cdd1bed 100644
--- a/tools/batch/glTF_2.0_schema.ini
+++ b/tools/batch/glTF_2.0_schema.ini
@@ -6,7 +6,7 @@ extensions_schema_directories=
     %(CD)s/../../external/glTF/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness/schema
 major_version=0
 minor_version=1
-patch_version=1
+patch_version=2
 
 [code.headers]
 extension.schema.json=%(CD)s/codes/extension.schema.json.h
diff --git a/tools/jsonschematoc11/c11types/c11typestruct.py b/tools/jsonschematoc11/c11types/c11typestruct.py
index c3b7b56..e65cf8d 100644
--- a/tools/jsonschematoc11/c11types/c11typestruct.py
+++ b/tools/jsonschematoc11/c11types/c11typestruct.py
@@ -132,7 +132,7 @@ def codeHeader(self, codeTypeNames):
         codeLines.append(u'    %s();' % self.codeTypeName())
         codeLines.append(u'')
         codeLines.append(u'    // Check valid')
-        codeLines.append(u'    virtual operator bool() const;')
+        codeLines.append(u'    operator bool() const;')
 
         if self.c11Type != None:
             codeLines.append(u'')