diff --git a/net/asterisk-13.x/Makefile b/net/asterisk-13.x/Makefile
index 2f81963..c8d334e 100644
--- a/net/asterisk-13.x/Makefile
+++ b/net/asterisk-13.x/Makefile
@@ -14,7 +14,7 @@ PKG_RELEASE:=1
 
 PKG_SOURCE:=asterisk-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://downloads.asterisk.org/pub/telephony/asterisk/releases/
-PKG_MD5SUM:=
+PKG_MD5SUM:=afc8a5b7fc239c7aa5692b563d7e6ed2
 
 PKG_BUILD_DIR=$(BUILD_DIR)/asterisk-$(PKG_VERSION)
 PKG_BUILD_DEPENDS:=libxml2/host