diff --git a/mailnews/base/src/nsMsgStatusFeedback.cpp b/mailnews/base/src/nsMsgStatusFeedback.cpp
index bb84b1c7c771..dc37092720e0 100644
--- a/mailnews/base/src/nsMsgStatusFeedback.cpp
+++ b/mailnews/base/src/nsMsgStatusFeedback.cpp
@@ -360,6 +360,6 @@ NS_IMETHODIMP nsMsgStatusFeedback::OnStatus(nsIChannel* channel, nsISupports* ct
   nsXPIDLString str;
   rv = sbs->FormatStatusMessage(aStatus, aStatusArg, getter_Copies(str));
   if (NS_FAILED(rv)) return rv;
-  nsAutoString msg = str;
+  nsAutoString msg = (const PRUnichar*)str;
   return ShowStatusString(msg.GetUnicode());
 }
diff --git a/webshell/tests/viewer/nsBrowserWindow.cpp b/webshell/tests/viewer/nsBrowserWindow.cpp
index 1d87819149c4..df5384e7675c 100644
--- a/webshell/tests/viewer/nsBrowserWindow.cpp
+++ b/webshell/tests/viewer/nsBrowserWindow.cpp
@@ -2187,7 +2187,7 @@ nsBrowserWindow::OnStatus(nsIChannel* channel, nsISupports *ctxt,
     rv = sbs->FormatStatusMessage(aStatus, aStatusArg, getter_Copies(msg));
     if (NS_FAILED(rv)) return rv;
     PRUint32 size;
-    nsAutoString msg2 = msg;
+    nsAutoString msg2 = (const PRUnichar*)msg;
     mStatus->SetText(msg2, size);
   }
   return NS_OK;
diff --git a/xpfe/components/xfer/src/nsStreamXferOp.cpp b/xpfe/components/xfer/src/nsStreamXferOp.cpp
index 8d0bd0070729..e52d173d5951 100644
--- a/xpfe/components/xfer/src/nsStreamXferOp.cpp
+++ b/xpfe/components/xfer/src/nsStreamXferOp.cpp
@@ -409,7 +409,7 @@ nsStreamXferOp::OnStatus( nsIChannel      *channel,
         nsXPIDLString str;
         rv = sbs->FormatStatusMessage(aStatus, aStatusArg, getter_Copies(str));
         if (NS_FAILED(rv)) return rv;
-        nsAutoString msg = str;
+        nsAutoString msg = (const PRUnichar*)str;
         rv = mObserver->Observe( (nsIStreamTransferOperation*)this,
                                   NS_ConvertASCIItoUCS2( NS_ISTREAMTRANSFER_PROGID ";onStatus" ).GetUnicode(),
                                   msg.GetUnicode() );