diff -Naur psmisc-22.18-orig/src/killall.c psmisc-22.18/src/killall.c
--- psmisc-22.18-orig/src/killall.c	2012-06-20 05:07:16.563742846 -0400
+++ psmisc-22.18/src/killall.c	2012-06-20 05:08:38.250412923 -0400
@@ -637,6 +637,7 @@
     "                      (must precede other arguments)\n"));
 #endif /*WITH_SELINUX*/
   fputc('\n', stderr);
+  exit (1);
 }