1 files changed, 1 insertions, 1 deletions
diff --git a/libalpine.sh.in b/libalpine.sh.in
index 569264c..3a25302 100755
--- a/libalpine.sh.in
+++ b/libalpine.sh.in
@@ -69,7 +69,7 @@ default_read() {
 
 invalid_ip() {
 	[ "$1" ] || return 0
-	! ipcalc -s $1
+	! ipcalc -s -m $1/0 > /dev/null
 }