diff --git a/package/Makefile.package.in b/package/Makefile.package.in
index 6f584a747a..58b417b056 100644
--- a/package/Makefile.package.in
+++ b/package/Makefile.package.in
@@ -402,7 +402,7 @@ $(2)_TARGET_BUILD =		$$($(2)_DIR)/.stamp_built
 $(2)_TARGET_CONFIGURE =		$$($(2)_DIR)/.stamp_configured
 $(2)_TARGET_PATCH =		$$($(2)_DIR)/.stamp_patched
 $(2)_TARGET_EXTRACT =		$$($(2)_DIR)/.stamp_extracted
-$(2)_TARGET_SOURCE ?=		$$($(2)_DIR)/.stamp_downloaded
+$(2)_TARGET_SOURCE =		$$($(2)_DIR)/.stamp_downloaded
 $(2)_TARGET_UNINSTALL =		$$($(2)_DIR)/.stamp_uninstalled
 $(2)_TARGET_CLEAN =		$$($(2)_DIR)/.stamp_cleaned
 $(2)_TARGET_DIRCLEAN =		$$($(2)_DIR)/.stamp_dircleaned