diff --git a/net/netcalc/Portfile b/net/netcalc/Portfile
index cb102a1f143..d8a660e7382 100644
--- a/net/netcalc/Portfile
+++ b/net/netcalc/Portfile
@@ -29,3 +29,6 @@ conflicts           ipcalc
 # Build picks gawk from MacPorts prefix.
 depends_build-append \
                     port:gawk
+
+github.livecheck.regex \
+                    {([0-9.]+)}