diff --git a/DirectXTex/filters.h b/DirectXTex/filters.h
index ef2c7a5..cebe13c 100644
--- a/DirectXTex/filters.h
+++ b/DirectXTex/filters.h
@@ -295,7 +295,7 @@ namespace TriangleFilter
         }
 
         assert(pFilter != nullptr);
-        _Analysis_assume_(pFilter != 0);
+        _Analysis_assume_(pFilter != nullptr);
 
         // Filter setup
         size_t sizeInBytes = TF_FILTER_SIZE;