diff --git a/desktop/wmmon/wmmon.SlackBuild b/desktop/wmmon/wmmon.SlackBuild
index ac27ff1368..170840d264 100644
--- a/desktop/wmmon/wmmon.SlackBuild
+++ b/desktop/wmmon/wmmon.SlackBuild
@@ -7,7 +7,7 @@
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
 PRGNAM=wmmon
-VERSION=1.0b2_p14
+VERSION=${VERSION:-1.0b2_p14}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}