diff --git a/src/drag_out_win.cpp b/src/drag_out_win.cpp
index d6c9685..e555f24 100644
--- a/src/drag_out_win.cpp
+++ b/src/drag_out_win.cpp
@@ -138,10 +138,12 @@ public:
         HGLOBAL copy = GlobalAlloc(GMEM_MOVEABLE, sz);
         if (!copy) return E_OUTOFMEMORY;
         void* src = GlobalLock(hdrop_);
+        if (!src) { GlobalFree(copy); return E_OUTOFMEMORY; }
         void* dst = GlobalLock(copy);
-        if (src && dst) std::memcpy(dst, src, sz);
-        if (src) GlobalUnlock(hdrop_);
-        if (dst) GlobalUnlock(copy);
+        if (!dst) { GlobalUnlock(hdrop_); GlobalFree(copy); return E_OUTOFMEMORY; }
+        std::memcpy(dst, src, sz);
+        GlobalUnlock(hdrop_);
+        GlobalUnlock(copy);
 
         med->tymed = TYMED_HGLOBAL;
         med->hGlobal = copy;