diff --git a/mozilla/embedding/components/windowwatcher/src/nsPromptService.h b/mozilla/embedding/components/windowwatcher/src/nsPromptService.h
index ed9876632a9..9479bff9ccf 100644
--- a/mozilla/embedding/components/windowwatcher/src/nsPromptService.h
+++ b/mozilla/embedding/components/windowwatcher/src/nsPromptService.h
@@ -52,7 +52,6 @@
 
 class nsIDOMWindow;
 class nsIDialogParamBlock;
-class nsIPrintSettings;
 
 class nsPromptService: public nsIPromptService,
                        public nsPIPromptService {