diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index 7779a76..bc2dab8 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -142,7 +142,7 @@
 
 Renderer11 *Renderer11::makeRenderer11(Renderer *renderer)
 {
-    ASSERT(dynamic_cast<rx::Renderer11*>(renderer) != NULL);
+    ASSERT(HAS_DYNAMIC_TYPE(rx::Renderer11*, renderer));
     return static_cast<rx::Renderer11*>(renderer);
 }