diff --git a/camino/src/embedding/CHBrowserService.mm b/camino/src/embedding/CHBrowserService.mm
index d536d840e22e..16201ccc0f81 100644
--- a/camino/src/embedding/CHBrowserService.mm
+++ b/camino/src/embedding/CHBrowserService.mm
@@ -270,7 +270,7 @@ CHBrowserService::Show(nsIHelperAppLauncher* inLauncher, nsISupports* inContext,
 }
 
 NS_IMETHODIMP
-CHBrowserService::PromptForSaveToFile(nsISupports *aWindowContext, const PRUnichar *aDefaultFile, const PRUnichar *aSuggestedFileExtension, nsILocalFile **_retval)
+CHBrowserService::PromptForSaveToFile(nsIHelperAppLauncher* aLauncher, nsISupports *aWindowContext, const PRUnichar *aDefaultFile, const PRUnichar *aSuggestedFileExtension, nsILocalFile **_retval)
 {
   NSString* filename = [NSString stringWithPRUnichars:aDefaultFile];
   NSSavePanel *thePanel = [NSSavePanel savePanel];