diff --git a/jme3-core/src/main/resources/Common/MatDefs/ShaderNodes/Environment/envMapping100.frag b/jme3-core/src/main/resources/Common/MatDefs/ShaderNodes/Environment/envMapping100.frag
index cf2c1e49a..9d40ec523 100644
--- a/jme3-core/src/main/resources/Common/MatDefs/ShaderNodes/Environment/envMapping100.frag
+++ b/jme3-core/src/main/resources/Common/MatDefs/ShaderNodes/Environment/envMapping100.frag
@@ -1,4 +1,4 @@
-#extension GL_ARB_shader_texture_lod : require
+#extension GL_ARB_shader_texture_lod : enable
 void main(){
         //@input vec3 refVec the reflection vector
     //@input samplerCube cubeMap the cube map
diff --git a/jme3-core/src/main/resources/Common/ShaderLib/PBR.glsllib b/jme3-core/src/main/resources/Common/ShaderLib/PBR.glsllib
index 8c57b36cc..75387bb05 100644
--- a/jme3-core/src/main/resources/Common/ShaderLib/PBR.glsllib
+++ b/jme3-core/src/main/resources/Common/ShaderLib/PBR.glsllib
@@ -1,4 +1,4 @@
-#extension GL_ARB_shader_texture_lod : require
+#extension GL_ARB_shader_texture_lod : enable
 #ifndef PI
     #define PI 3.14159265358979323846264
 #endif