diff --git a/network/ipcalc/ipcalc.SlackBuild b/network/ipcalc/ipcalc.SlackBuild
index 1a5b2fb02c..b7fd6185c5 100644
--- a/network/ipcalc/ipcalc.SlackBuild
+++ b/network/ipcalc/ipcalc.SlackBuild
@@ -23,7 +23,7 @@
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 PRGNAM=ipcalc
-VERSION=0.41
+VERSION=${VERSION:-0.41}
 ARCH=noarch
 BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}