diff --git a/build/mac/NGLayoutBuildList.pm b/build/mac/NGLayoutBuildList.pm
index e9f57156ca1..c0a566b9eb5 100644
--- a/build/mac/NGLayoutBuildList.pm
+++ b/build/mac/NGLayoutBuildList.pm
@@ -604,6 +604,7 @@ sub MakeResouceAliases()
 	BuildFolderResourceAliases(":mozilla:xpfe:browser:src:", 							"$samples_dir");
 	BuildFolderResourceAliases(":mozilla:xpfe:AppCores:xul:",							"$samples_dir");
 	BuildFolderResourceAliases(":mozilla:xpfe:AppCores:xul:resources:",					"$toolbar_dir");
+	MakeAlias(":mozilla:xpfe:AppCores:xul:resources:throbbingN.gif",					"$throbber_dir");
 }