diff --git a/plugins/GSdx/GSDeviceOGL.cpp b/plugins/GSdx/GSDeviceOGL.cpp
index 6c33e09ed8..f53c92dfd0 100644
--- a/plugins/GSdx/GSDeviceOGL.cpp
+++ b/plugins/GSdx/GSDeviceOGL.cpp
@@ -354,7 +354,7 @@ bool GSDeviceOGL::Create(GSWnd* wnd)
 
 	// Basic to ensure structures are correctly packed
 	ASSERT(sizeof(VSSelector) == 4);
-	ASSERT(sizeof(PSSelector) == 4);
+	ASSERT(sizeof(PSSelector) == 8);
 	ASSERT(sizeof(PSSamplerSelector) == 4);
 	ASSERT(sizeof(OMDepthStencilSelector) == 4);
 	ASSERT(sizeof(OMColorMaskSelector) == 4);