diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index b395f538..92bc5a2b 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -196,7 +196,7 @@ function(glad_add_library TARGET)
     if(GG_EXTENSIONS)
         list(FIND GG_EXTENSIONS NONE GG_EXT_NONE)
         if(GG_EXT_NONE GREATER -1)
-            set(GLAD_EXTENSIONS "''")
+            set(GLAD_EXTENSIONS " ")
         else()
             list(REMOVE_DUPLICATES GG_EXTENSIONS)
             list(JOIN GG_EXTENSIONS "," GLAD_EXTENSIONS)