diff --git a/widget/windows/nsDataObj.cpp b/widget/windows/nsDataObj.cpp
index f5470e828e..a1be1f96e1 100644
--- a/widget/windows/nsDataObj.cpp
+++ b/widget/windows/nsDataObj.cpp
@@ -921,7 +921,7 @@ nsDataObj::GetDib(const nsACString& inFlavor,
   if ( image ) {
     nsCOMPtr<imgITools> imgTools = do_CreateInstance("@mozilla.org/image/tools;1");
 
-    nsAutoString options;
+    nsAutoString options(NS_LITERAL_STRING("bpp=32;"));
     if (aFormat.cfFormat == CF_DIBV5) {
       options.AppendLiteral("version=5");
     } else {
@@ -1581,7 +1581,7 @@ HRESULT nsDataObj::DropImage(FORMATETC& aFE, STGMEDIUM& aSTG)
     nsCOMPtr<imgITools> imgTools = do_CreateInstance("@mozilla.org/image/tools;1");
     nsCOMPtr<nsIInputStream> inputStream;
     rv = imgTools->EncodeImage(image, NS_LITERAL_CSTRING(IMAGE_BMP),
-                               NS_LITERAL_STRING("version=3"),
+                               NS_LITERAL_STRING("bpp=32;version=3"),
                                getter_AddRefs(inputStream));
     if (NS_FAILED(rv) || !inputStream) {
       return E_FAIL;