diff --git a/misc/quitcd/quitcd.fish b/misc/quitcd/quitcd.fish
index 952ae169..a8c3dc43 100644
--- a/misc/quitcd/quitcd.fish
+++ b/misc/quitcd/quitcd.fish
@@ -4,7 +4,7 @@
 
 function n --wraps nnn --description 'support nnn quit and change directory'
     # Block nesting of nnn in subshells
-    if test -n "$NNNLVL" -a $NNNLVL -ge 1
+    if test -n "$NNNLVL" -a "$NNNLVL" -ge 1
         echo "nnn is already running"
         return
     end