diff --git a/widget/src/windows/IENUMFE.CPP b/widget/src/windows/IENUMFE.CPP
index 681cdef69cae..75e3f6912c6f 100644
--- a/widget/src/windows/IENUMFE.CPP
+++ b/widget/src/windows/IENUMFE.CPP
@@ -293,6 +293,7 @@ STDMETHODIMP CEnumFormatEtc::Reset(void)
  *
  * Purpose:
  *  Returns another IEnumFORMATETC with the same state as ourselves.
+ *  It is addrefed.
  *
  * Parameters:
  *  ppEnum          LPENUMFORMATETC * in which to return the
diff --git a/widget/src/windows/nsDataObj.cpp b/widget/src/windows/nsDataObj.cpp
index 14cc205d0db5..d996b8d0d554 100644
--- a/widget/src/windows/nsDataObj.cpp
+++ b/widget/src/windows/nsDataObj.cpp
@@ -435,8 +435,9 @@ STDMETHODIMP_(ULONG) nsDataObj::Release()
 	if (0 < g_cRef)
 		--g_cRef;
 
+	--m_cRef;
 	NS_LOG_RELEASE(this, m_cRef, "nsDataObj");
-	if (0 != --m_cRef)
+	if (0 != m_cRef)
 		return m_cRef;
 
 	delete this;
@@ -754,16 +755,11 @@ STDMETHODIMP nsDataObj::EnumFormatEtc(DWORD dwDir, LPENUMFORMATETC *ppEnum)
         break;
   } // switch
 
-  // Since a new one has been created, 
-  // we will ref count the new clone here 
-  // before giving it back
   if (NULL == *ppEnum)
     return ResultFromScode(E_FAIL);
-  else
-    (*ppEnum)->AddRef();
 
+  // Clone already AddRefed the result so don't addref it again.
   return NOERROR;
-
 }
 
 //-----------------------------------------------------