diff --git a/dlls/oleacc/main.c b/dlls/oleacc/main.c
index 18a43fb4c06..e5fe6cdb406 100644
--- a/dlls/oleacc/main.c
+++ b/dlls/oleacc/main.c
@@ -219,10 +219,10 @@ HRESULT WINAPI ObjectFromLresult( LRESULT result, REFIID riid, WPARAM wParam, vo
         return E_FAIL;
 
     data = GlobalAlloc(GMEM_FIXED, size);
-    memcpy(data, view, size);
-    UnmapViewOfFile(view);
     if(!data)
         return E_OUTOFMEMORY;
+    memcpy(data, view, size);
+    UnmapViewOfFile(view);
 
     hr = CreateStreamOnHGlobal(data, TRUE, &stream);
     if(FAILED(hr)) {