diff --git a/bin/shaders/GSdx.fx b/bin/shaders/GSdx.fx
index a7c5bec9b8..2d9468f90c 100644
--- a/bin/shaders/GSdx.fx
+++ b/bin/shaders/GSdx.fx
@@ -17,7 +17,6 @@
 
 #ifndef SHADER_MODEL
 #define GLSL 1
-#extension GL_ARB_gpu_shader5 : enable
 #else
 #define GLSL 0
 #endif
diff --git a/plugins/GSdx/GSDeviceOGL.cpp b/plugins/GSdx/GSDeviceOGL.cpp
index 4bee2cc9be..2d0c92875f 100644
--- a/plugins/GSdx/GSDeviceOGL.cpp
+++ b/plugins/GSdx/GSDeviceOGL.cpp
@@ -1528,6 +1528,7 @@ void GSDeviceOGL::DoExternalFX(GSTexture* sTex, GSTexture* dTex)
 		std::string   config_name(theApp.GetConfigS("shaderfx_conf"));
 		std::ifstream fconfig(config_name);
 		std::stringstream config;
+		config << "#extension GL_ARB_gpu_shader5 : require\n";
 		if (fconfig.good())
 			config << fconfig.rdbuf();
 		else