diff --git a/build/jam/ImageRules b/build/jam/ImageRules
index 3eda4c8938..968d1f6033 100644
--- a/build/jam/ImageRules
+++ b/build/jam/ImageRules
@@ -610,7 +610,7 @@ rule IsOptionalHaikuImagePackageAdded package
 rule InstallOptionalHaikuImagePackage package : url : dirTokens
 {
 	# download zip file
-	local zipFile = $(package:S=.zip:G=download) ;
+	local zipFile = $(package:G=download).zip ;
 	MakeLocate $(zipFile) : $(HAIKU_DOWNLOAD_DIR) ;
 	DownloadFile $(zipFile) : $(url) ;