diff --git a/Shorewall/configfiles/shorewall.conf b/Shorewall/configfiles/shorewall.conf
index 078bfeffc..9f722edff 100644
--- a/Shorewall/configfiles/shorewall.conf
+++ b/Shorewall/configfiles/shorewall.conf
@@ -63,7 +63,7 @@ RPFILTER_LOG_LEVEL="$LOG_LEVEL"
 
 SFILTER_LOG_LEVEL="$LOG_LEVEL"
 
-SMURF_LOG_LEVEL=$LOG_LEVEL
+SMURF_LOG_LEVEL="$LOG_LEVEL"
 
 STARTUP_LOG=/var/log/shorewall-init.log