--- Completion/Unix/Command/_ant
+++ Completion/Unix/Command/_ant
@@ -79,8 +79,8 @@ case $state in
     compset -P '*:'
     compset -S ':*'
     _alternative \
-      "classpath:$state:_path_files -qS: -g '*.(jar|zip)(-.)'" \
-      "classpath:$state:_path_files -r': ' -/" && ret=0
+      "classpath:${state}:_path_files -qS: -g '*.(jar|zip)(-.)'" \
+      "classpath:${state}:_path_files -r': ' -/" && ret=0
   ;;
   property)
     if compset -P 1 '*='; then