diff --git a/Shorewall-lite/init.debian.sh b/Shorewall-lite/init.debian.sh
index d22fc7f82..e84f1025d 100755
--- a/Shorewall-lite/init.debian.sh
+++ b/Shorewall-lite/init.debian.sh
@@ -23,7 +23,7 @@ export SHOREWALL_INIT_SCRIPT
 
 test -x $SRWL || exit 0
 test -x $WAIT_FOR_IFUP || exit 0
-test -n $INITLOG || {
+test -n "$INITLOG" || {
 	echo "INITLOG cannot be empty, please configure $0" ; 
 	exit 1;
 }
diff --git a/Shorewall/init.debian.sh b/Shorewall/init.debian.sh
index e832a3ac5..d0f86e25f 100755
--- a/Shorewall/init.debian.sh
+++ b/Shorewall/init.debian.sh
@@ -19,7 +19,7 @@ test -n ${INITLOG:=/var/log/shorewall-init.log}
 
 test -x $SRWL || exit 0
 test -x $WAIT_FOR_IFUP || exit 0
-test -n $INITLOG || {
+test -n "$INITLOG" || {
 	echo "INITLOG cannot be empty, please configure $0" ; 
 	exit 1;
 }
diff --git a/Shorewall6-lite/init.debian.sh b/Shorewall6-lite/init.debian.sh
index 7a4cf12dc..576db1b75 100755
--- a/Shorewall6-lite/init.debian.sh
+++ b/Shorewall6-lite/init.debian.sh
@@ -23,7 +23,7 @@ export SHOREWALL_INIT_SCRIPT
 
 test -x $SRWL || exit 0
 test -x $WAIT_FOR_IFUP || exit 0
-test -n $INITLOG || {
+test -n "$INITLOG" || {
 	echo "INITLOG cannot be empty, please configure $0" ; 
 	exit 1;
 }
diff --git a/Shorewall6/init.debian.sh b/Shorewall6/init.debian.sh
index 46c7e2a94..559e5427e 100755
--- a/Shorewall6/init.debian.sh
+++ b/Shorewall6/init.debian.sh
@@ -19,7 +19,7 @@ test -n ${INITLOG:=/var/log/shorewall6-init.log}
 
 test -x $SRWL || exit 0
 test -x $WAIT_FOR_IFUP || exit 0
-test -n $INITLOG || {
+test -n "$INITLOG" || {
 	echo "INITLOG cannot be empty, please configure $0" ; 
 	exit 1;
 }