diff --git a/plugins/GSdx/GLLoader.cpp b/plugins/GSdx/GLLoader.cpp
index 39820231a..167054199 100644
--- a/plugins/GSdx/GLLoader.cpp
+++ b/plugins/GSdx/GLLoader.cpp
@@ -178,6 +178,7 @@ namespace GLLoader {
 	bool found_GL_ARB_shading_language_420pack = false;
 	bool found_GL_ARB_texture_barrier = false;
 	bool found_GL_ARB_texture_storage = false;
+	bool found_GL_KHR_debug = false;
 
 	static bool status_and_override(bool& found, const std::string& name, bool mandatory = false)
 	{
@@ -268,6 +269,7 @@ namespace GLLoader {
 				if (ext.compare("GL_ARB_shader_image_load_store") == 0) found_GL_ARB_shader_image_load_store = true;
 				// GL4.3
 				if (ext.compare("GL_ARB_copy_image") == 0) found_GL_ARB_copy_image = true;
+				if (ext.compare("GL_KHR_debug") == 0) found_GL_KHR_debug = true;
 				// GL4.4
 				if (ext.compare("GL_ARB_buffer_storage") == 0) found_GL_ARB_buffer_storage = true;
 				if (ext.compare("GL_ARB_clear_texture") == 0) found_GL_ARB_clear_texture = true;
@@ -296,6 +298,7 @@ namespace GLLoader {
 		status &= status_and_override(found_GL_ARB_texture_storage, "GL_ARB_texture_storage", true);
 		// GL4.3
 		status &= status_and_override(found_GL_ARB_copy_image, "GL_ARB_copy_image", true);
+		status &= status_and_override(found_GL_KHR_debug, "GL_KHR_debug", true);
 		// GL4.4
 		status &= status_and_override(found_GL_ARB_buffer_storage,"GL_ARB_buffer_storage", true);
 		status &= status_and_override(found_GL_ARB_clear_texture,"GL_ARB_clear_texture");
diff --git a/plugins/GSdx/GSDeviceOGL.cpp b/plugins/GSdx/GSDeviceOGL.cpp
index caf43c071..adabece63 100644
--- a/plugins/GSdx/GSDeviceOGL.cpp
+++ b/plugins/GSdx/GSDeviceOGL.cpp
@@ -182,16 +182,13 @@ bool GSDeviceOGL::Create(GSWnd* wnd)
 	// ****************************************************************
 #ifdef ENABLE_OGL_DEBUG
 	if (theApp.GetConfig("debug_opengl", 0)) {
-		if (glDebugMessageCallback) {
-			glDebugMessageCallback((GLDEBUGPROC)DebugOutputToFile, NULL);
-			glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
-		}
-		if (glDebugMessageControl) {
-			glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, true);
-			// Useless info message on Nvidia driver
-			GLuint ids[] = {0x20004};
-			glDebugMessageControl(GL_DEBUG_SOURCE_API_ARB, GL_DEBUG_TYPE_OTHER_ARB, GL_DONT_CARE, countof(ids), ids, false);
-		}
+		glDebugMessageCallback((GLDEBUGPROC)DebugOutputToFile, NULL);
+		glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
+
+		glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, true);
+		// Useless info message on Nvidia driver
+		GLuint ids[] = {0x20004};
+		glDebugMessageControl(GL_DEBUG_SOURCE_API_ARB, GL_DEBUG_TYPE_OTHER_ARB, GL_DONT_CARE, countof(ids), ids, false);
 	}
 #endif
 
diff --git a/plugins/GSdx/GSWnd.cpp b/plugins/GSdx/GSWnd.cpp
index d20335073..03ce7df52 100644
--- a/plugins/GSdx/GSWnd.cpp
+++ b/plugins/GSdx/GSWnd.cpp
@@ -63,7 +63,6 @@ void GSWndGL::PopulateGlFunction()
 	GL_EXT_LOAD(glGenVertexArrays);
 	GL_EXT_LOAD(glGetBufferParameteriv);
 	GL_EXT_LOAD(glGetDebugMessageLogARB);
-	GL_EXT_LOAD_OPT(glDebugMessageCallback);
 	GL_EXT_LOAD(glGetProgramInfoLog);
 	GL_EXT_LOAD(glGetProgramiv);
 	GL_EXT_LOAD(glGetShaderiv);
@@ -118,10 +117,11 @@ void GSWndGL::PopulateGlFunction()
 	// GL4.3
 	GL_EXT_LOAD(glCopyImageSubData);
 	GL_EXT_LOAD_OPT(glInvalidateTexImage);
-	GL_EXT_LOAD_OPT(glPushDebugGroup);
-	GL_EXT_LOAD_OPT(glPopDebugGroup);
-	GL_EXT_LOAD_OPT(glDebugMessageInsert);
-	GL_EXT_LOAD_OPT(glDebugMessageControl);
+	GL_EXT_LOAD(glPushDebugGroup);
+	GL_EXT_LOAD(glPopDebugGroup);
+	GL_EXT_LOAD(glDebugMessageInsert);
+	GL_EXT_LOAD(glDebugMessageControl);
+	GL_EXT_LOAD(glDebugMessageCallback);
 	// GL4.4
 	GL_EXT_LOAD_OPT(glClearTexImage);
 	GL_EXT_LOAD(glBufferStorage);
diff --git a/plugins/GSdx/stdafx.h b/plugins/GSdx/stdafx.h
index e1ffe1ed7..0c2f968c8 100644
--- a/plugins/GSdx/stdafx.h
+++ b/plugins/GSdx/stdafx.h
@@ -425,7 +425,7 @@ extern void vmfree(void* ptr, size_t size);
 #endif
 
 #define GL_INSERT(type, code, sev, ...) \
-	do if (glDebugMessageInsert) glDebugMessageInsert(GL_DEBUG_SOURCE_APPLICATION, type, code, sev, -1, format(__VA_ARGS__).c_str()); while(0);
+	do glDebugMessageInsert(GL_DEBUG_SOURCE_APPLICATION, type, code, sev, -1, format(__VA_ARGS__).c_str()); while(0);
 
 // Except apple any sane driver support this extension
 #if defined(_DEBUG)
@@ -435,8 +435,8 @@ extern void vmfree(void* ptr, size_t size);
 #endif
 
 #if defined(ENABLE_OGL_DEBUG)
-#define GL_PUSH(...)	do if (glPushDebugGroup) glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0xBAD, -1, format(__VA_ARGS__).c_str()); while(0);
-#define GL_POP()        do if (glPopDebugGroup) glPopDebugGroup(); while(0);
+#define GL_PUSH(...)	do glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0xBAD, -1, format(__VA_ARGS__).c_str()); while(0);
+#define GL_POP()        do glPopDebugGroup(); while(0);
 #define GL_INS(...)		GL_INSERT(GL_DEBUG_TYPE_ERROR, 0xDEAD, GL_DEBUG_SEVERITY_MEDIUM, __VA_ARGS__)
 #define GL_PERF(...)	GL_INSERT(GL_DEBUG_TYPE_PERFORMANCE, 0xFEE1, GL_DEBUG_SEVERITY_NOTIFICATION, __VA_ARGS__)
 #else