diff --git a/files/shaders/groundcover_fragment.glsl b/files/shaders/groundcover_fragment.glsl
index bc84ded61..f25b7d487 100644
--- a/files/shaders/groundcover_fragment.glsl
+++ b/files/shaders/groundcover_fragment.glsl
@@ -1,7 +1,7 @@
 #version 120
 
 #if @useGPUShader4
-    #extension EXT_gpu_shader4: require
+    #extension GL_EXT_gpu_shader4: require
 #endif
 
 #define GROUNDCOVER
diff --git a/files/shaders/shadowcasting_fragment.glsl b/files/shaders/shadowcasting_fragment.glsl
index a83e155ca..07fad047e 100644
--- a/files/shaders/shadowcasting_fragment.glsl
+++ b/files/shaders/shadowcasting_fragment.glsl
@@ -1,7 +1,7 @@
 #version 120
 
 #if @useGPUShader4
-    #extension EXT_gpu_shader4: require
+    #extension GL_EXT_gpu_shader4: require
 #endif
 
 uniform sampler2D diffuseMap;