diff --git a/live-build/auto/config b/live-build/auto/config
index 5d464e26..c391eb14 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -405,7 +405,7 @@ case $IMAGEFORMAT in
 			ubuntu-server|ubuntu-touch|ubuntu-touch-custom)
 				;;
 			ubuntu)
-				if [ $SUBPROJECT != "canary" ]; then
+				if [ "$SUBPROJECT" != "canary" ]; then
 					add_package live lupin-casper
 				fi
 				;;