diff --git a/package/libass/libass.mk b/package/libass/libass.mk
index 2b734c85f2..056ea8b1aa 100644
--- a/package/libass/libass.mk
+++ b/package/libass/libass.mk
@@ -5,6 +5,7 @@
 ################################################################################
 
 LIBASS_VERSION = 0.10.2
+LIBASS_SOURCE = libass-$(LIBASS_VERSION).tar.xz
 LIBASS_SITE = http://libass.googlecode.com/files
 LIBASS_INSTALL_STAGING = YES
 LIBASS_LICENSE = ISC