diff --git a/sdk/lib/atl/atlimage.h b/sdk/lib/atl/atlimage.h
index 84c6d63e511..21d5752280d 100644
--- a/sdk/lib/atl/atlimage.h
+++ b/sdk/lib/atl/atlimage.h
@@ -65,7 +65,7 @@ public:
 
     HBITMAP Detach() noexcept
     {
-        m_hOldBitmap = m_hBitmap = NULL;
+        m_hOldBitmap = NULL;
         m_nWidth = m_nHeight = m_nPitch = m_nBPP = 0;
         m_pBits = NULL;