--- a/layout/printing/nsPrintEngine.cpp
+++ b/layout/printing/nsPrintEngine.cpp
@@ -1067,18 +1067,21 @@ nsPrintEngine::ShowPrintProgress(bool aI
       nsCOMPtr<nsIWebProgressListener> printProgressListener;
 
       nsCOMPtr<nsIWebBrowserPrint> wbp(do_QueryInterface(mDocViewerPrint));
       nsresult rv = printPromptService->ShowProgress(domWin, wbp, mPrt->mPrintSettings, this, aIsForPrinting,
                                                      getter_AddRefs(printProgressListener), 
                                                      getter_AddRefs(mPrt->mPrintProgressParams), 
                                                      &aDoNotify);
       if (NS_SUCCEEDED(rv)) {
-        if (printProgressListener && mPrt->mPrintProgressParams) {
+        if (printProgressListener) {
           mPrt->mPrintProgressListeners.AppendObject(printProgressListener);
+        }
+
+        if (mPrt->mPrintProgressParams) {
           SetDocAndURLIntoProgress(mPrt->mPrintObject, mPrt->mPrintProgressParams);
         }
       }
     }
   }
 }
 
 //---------------------------------------------------------------------