diff --git a/mxqsub.c b/mxqsub.c
index 7858a703..fb15cb2e 100644
--- a/mxqsub.c
+++ b/mxqsub.c
@@ -58,7 +58,8 @@ static void print_usage(void)
     "  by the cluster:\n"
     "\n"
     "Job environment:\n"
-    "  -w, --workdir=DIRECTORY   set working directory      (default: current workdir)\n"
+    "  -w, --workdir=DIRECTORY   set working directory (has to exist)\n"
+    "                                                       (default: current workdir)\n"
     "  -o, --stdout=FILE         set file to capture stdout (default: '/dev/null')\n"
     "  -e, --stderr=FILE         set file to capture stderr (default: <stdout>)\n"
     "  -u, --umask=MASK          set mode to use as umask   (default: current umask)\n"