diff --git a/Shorewall-core/configure b/Shorewall-core/configure
index 5325f4016..82a26ec40 100755
--- a/Shorewall-core/configure
+++ b/Shorewall-core/configure
@@ -54,7 +54,7 @@ fi
 for p in $@; do
   p=${p#--}
 
-  [ -n "${p}" ] && {
+  if [ -n "${p}" ]; then
     pn=${p%=*}
     pv=${p#*=}