diff --git a/libraries/pbrlib/genmdl/mx39_pbrlib_genmdl_impl.mtlx b/libraries/pbrlib/genmdl/mx39_pbrlib_genmdl_impl.mtlx
index 5bc13eb9fd..f2dc8c184d 100644
--- a/libraries/pbrlib/genmdl/mx39_pbrlib_genmdl_impl.mtlx
+++ b/libraries/pbrlib/genmdl/mx39_pbrlib_genmdl_impl.mtlx
@@ -11,6 +11,6 @@
   <implementation name="IM_generalized_schlick_tf_82_bsdf_genmdl" nodedef="ND_generalized_schlick_tf_82_bsdf" sourcecode="materialx::pbrlib_{{MDL_VERSION_SUFFIX}}::mx_generalized_schlick_bsdf(mxp_weight:{{weight}}, mxp_color0:{{color0}}, mxp_color90:{{color90}}, mxp_exponent:{{exponent}},mxp_roughness:{{roughness}}, mxp_thinfilm_thickness:{{thinfilm_thickness}}, mxp_thinfilm_ior:{{thinfilm_ior}}, mxp_normal:{{normal}}, mxp_tangent:{{tangent}}, mxp_distribution:{{distribution}}, mxp_scatter_mode:{{scatter_mode}}, mxp_base:{{base}})" target="genmdl" />
 
   <!-- <sheen_zeltner_bsdf> -->
-  <implementation name="IM_sheen_zeltner_bsdf_genmdl" nodedef="ND_sheen_zeltner_bsdf" sourcecode="materialx::pbrlib_{{MDL_VERSION_SUFFIX}}::mx_sheen_bsdf(mxp_weight:{{weight}}, mxp_color:{{color}}, mxp_roughness:{{roughness}}, mxp_normal:{{normal}}, mxp_base:{{weight}})" target="genmdl" />
+  <implementation name="IM_sheen_zeltner_bsdf_genmdl" nodedef="ND_sheen_zeltner_bsdf" sourcecode="materialx::pbrlib_{{MDL_VERSION_SUFFIX}}::mx_sheen_bsdf(mxp_weight:{{weight}}, mxp_color:{{color}}, mxp_roughness:{{roughness}}, mxp_normal:{{normal}}, mxp_base:{{base}})" target="genmdl" />
 
 </materialx>
diff --git a/libraries/pbrlib/genmdl/pbrlib_genmdl_impl.mtlx b/libraries/pbrlib/genmdl/pbrlib_genmdl_impl.mtlx
index b642c9343c..a4277bf675 100644
--- a/libraries/pbrlib/genmdl/pbrlib_genmdl_impl.mtlx
+++ b/libraries/pbrlib/genmdl/pbrlib_genmdl_impl.mtlx
@@ -23,7 +23,7 @@
   <implementation name="IM_subsurface_bsdf_genmdl" nodedef="ND_subsurface_bsdf" sourcecode="materialx::pbrlib_{{MDL_VERSION_SUFFIX}}::mx_subsurface_bsdf(mxp_weight:{{weight}}, mxp_color:{{color}}, mxp_radius:{{radius}}, mxp_anisotropy:{{anisotropy}}, mxp_normal:{{normal}})" target="genmdl" />
 
   <!-- <sheen_bsdf> -->
-  <implementation name="IM_sheen_bsdf_genmdl" nodedef="ND_sheen_bsdf" sourcecode="materialx::pbrlib_{{MDL_VERSION_SUFFIX}}::mx_sheen_bsdf(mxp_weight:{{weight}}, mxp_color:{{color}}, mxp_roughness:{{roughness}}, mxp_normal:{{normal}}, mxp_base:{{weight}})" target="genmdl" />
+  <implementation name="IM_sheen_bsdf_genmdl" nodedef="ND_sheen_bsdf" sourcecode="materialx::pbrlib_{{MDL_VERSION_SUFFIX}}::mx_sheen_bsdf(mxp_weight:{{weight}}, mxp_color:{{color}}, mxp_roughness:{{roughness}}, mxp_normal:{{normal}}, mxp_base:{{base}})" target="genmdl" />
 
   <!-- <thin_film_bsdf> -->
   <implementation name="IM_thin_film_bsdf_genmdl" nodedef="ND_thin_film_bsdf" sourcecode="materialx::pbrlib_{{MDL_VERSION_SUFFIX}}::mx_thin_film_bsdf(mxp_thickness:{{thickness}}, mxp_ior:{{ior}}, mxp_base:{{base}})" target="genmdl" />