diff --git a/project/src/graphics/opengl/OpenGL.h b/project/src/graphics/opengl/OpenGL.h
index 576760480..63011a947 100644
--- a/project/src/graphics/opengl/OpenGL.h
+++ b/project/src/graphics/opengl/OpenGL.h
@@ -90,6 +90,7 @@ typedef ptrdiff_t GLsizeiptrARB;
 #ifdef NATIVE_TOOLKIT_SDL_ANGLE
 #include <SDL_opengles2.h>
 #else
+#define GL_GLEXT_PROTOTYPES
 #include <SDL_opengl.h>
 #include <SDL_opengl_glext.h>
 #endif
diff --git a/project/src/graphics/opengl/OpenGLBindings.cpp b/project/src/graphics/opengl/OpenGLBindings.cpp
index 4ea3d4a2e..7936378a8 100644
--- a/project/src/graphics/opengl/OpenGLBindings.cpp
+++ b/project/src/graphics/opengl/OpenGLBindings.cpp
@@ -1528,7 +1528,7 @@ namespace lime {
 	}
 	
 	
-	int lime_gl_get_sync_parameteri (double sync, int pname) {
+	int lime_gl_get_sync_parameteri (value sync, int pname) {
 		
 		// TODO
 		
@@ -1539,7 +1539,7 @@ namespace lime {
 	}
 	
 	
-	void lime_gl_get_sync_parameteriv (double sync, int pname, double params) {
+	void lime_gl_get_sync_parameteriv (value sync, int pname, double params) {
 		
 		// TODO