diff --git a/src/util/com/com_object.h b/src/util/com/com_object.h
index 54304b0c..7f6ec256 100644
--- a/src/util/com/com_object.h
+++ b/src/util/com/com_object.h
@@ -58,8 +58,8 @@ namespace dxvk {
     
   private:
     
-    std::atomic<ULONG> m_refCount   = { 0ul };
-    std::atomic<ULONG> m_refPrivate = { 0ul };
+    std::atomic<uint32_t> m_refCount   = { 0ul };
+    std::atomic<uint32_t> m_refPrivate = { 0ul };
     
   };