diff --git a/mozilla/browser/components/shell/src/nsMacShellService.cpp b/mozilla/browser/components/shell/src/nsMacShellService.cpp
index 9b737bad6f7..0d6e9cc862d 100644
--- a/mozilla/browser/components/shell/src/nsMacShellService.cpp
+++ b/mozilla/browser/components/shell/src/nsMacShellService.cpp
@@ -100,3 +100,14 @@ nsMacShellService::OpenPreferredApplication(PRInt32 aApplication)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsMacShellService::GetDesktopBackgroundColor(PRUint32 *aColor)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsMacShellService::SetDesktopBackgroundColor(PRUint32 *aColor)
+{
+  return NS_OK;
+}