diff --git a/deps/libsigc++/libsigc++.SlackBuild b/deps/libsigc++/libsigc++.SlackBuild
index fa418e7..4dd27ec 100644
--- a/deps/libsigc++/libsigc++.SlackBuild
+++ b/deps/libsigc++/libsigc++.SlackBuild
@@ -27,7 +27,7 @@
 # Modified by Willy Sudiarto Raharjo <willysr@slackware-id.org> for MSB Project
 
 PRGNAM=libsigc++
-VERSION=2.2.11
+VERSION=${VERSION:-2.2.11}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_msb}