diff --git a/kiss b/kiss
index 99e1fa4..6b246db 100755
--- a/kiss
+++ b/kiss
@@ -615,7 +615,7 @@ pkg_build() {
     log "Building: $*"
 
     # Only ask for confirmation if more than one package needs to be built.
-    [ $# -gt 1 ] || [ "$pkg_update" ] && prompt
+    [ "$#" -gt 1 ] || [ "$pkg_update" ] && prompt
 
     for pkg do pkg_lint "$pkg"; done
 
@@ -714,7 +714,7 @@ pkg_build() {
     set -- $explicit
 
     # Only ask for confirmation if more than one package needs to be installed.
-    [ $# -gt 1 ] && prompt "Install built packages? [$*]" && {
+    [ "$#" -gt 1 ] && prompt "Install built packages? [$*]" && {
         args i "$@"
         return
     }