diff --git a/mozilla/extensions/psm-glue/src/nsPSMUICallbacks.cpp b/mozilla/extensions/psm-glue/src/nsPSMUICallbacks.cpp
index 092981d77b5..f9df8cd4f04 100644
--- a/mozilla/extensions/psm-glue/src/nsPSMUICallbacks.cpp
+++ b/mozilla/extensions/psm-glue/src/nsPSMUICallbacks.cpp
@@ -414,7 +414,7 @@ char * PromptUserCallback(void *arg, char *prompt, void* clientContext, int isPa
     }
     if (proxyPrompt) {
       rv = proxyPrompt->PromptPassword(nsnull, NS_ConvertASCIItoUCS2(prompt).GetUnicode(),
-                                       NS_LITERAL_STRING(" "),      // hostname
+                                       NS_LITERAL_STRING(" ").get(),      // hostname
                                        nsIPrompt::SAVE_PASSWORD_NEVER, &password, &value);
 
     }