1 files changed, 3 insertions, 0 deletions

diff --git a/procps/fuser.c b/procps/fuser.c
index 850626e42..35d77ed1c 100644
--- a/procps/fuser.c
+++ b/procps/fuser.c
@@ -326,6 +326,9 @@ int fuser_main(int argc, char **argv)
         int killsig = SIGTERM;
         int success = 1;
 
+        if (argc < 2)
+                bb_show_usage();
+
         fni = xmalloc(sizeof(int));
         for(i=1;i<argc;i++) {
                 optn = fuser_option(argv[i]);