diff -r 4b55f05f4e00 -r a297c2e28fa1 dav/sync.c
--- a/dav/sync.c	Sat Mar 19 18:49:36 2016 +0100
+++ b/dav/sync.c	Sun Mar 20 11:27:31 2016 +0100
@@ -112,6 +112,8 @@
         ret = cmd_add_directory(args);
     } else if(!strcmp(cmd, "list-directories")) {
         ret = list_syncdirs();
+    } else {
+        print_usage(argv[0]);
     }
     
     // cleanup