diff --git a/src/core/hle/D3D8/XbVertexShader.cpp b/src/core/hle/D3D8/XbVertexShader.cpp
index d2afc8c0f..abdc1e162 100644
--- a/src/core/hle/D3D8/XbVertexShader.cpp
+++ b/src/core/hle/D3D8/XbVertexShader.cpp
@@ -905,7 +905,7 @@ private:
 			return false;
 		}
 
-		assert(HostVertexElementDataType > 0);
+		assert(HostVertexElementDataType < D3DDECLTYPE_UNUSED);
 		assert(HostVertexElementByteSize > 0);
 
 		// Select new stream, if needed