diff --git a/Shorewall/firewall b/Shorewall/firewall
index 3dc743932..d68e020a8 100755
--- a/Shorewall/firewall
+++ b/Shorewall/firewall
@@ -3320,7 +3320,7 @@ report_capability() # $1 = Capability Name, $2 Capability Setting (if any)
 {
     local setting=
 
-    [ x$1 = "xYes" ] && { setting="Available"; shift; } || setting="Not available"
+    [ "x$1" = "xYes" ] && { setting="Available"; shift; } || setting="Not available"
 
     echo "  " $@: $setting
 }