diff --git a/apps/engine.c b/apps/engine.c
index 8f7b389f40e3939025b9264206378dbef474a581..25c86171079966bdfb7f23c67592f3e82b49d012 100644
--- a/apps/engine.c
+++ b/apps/engine.c
@@ -394,11 +394,15 @@ int MAIN(int argc, char **argv)
 		else if (strcmp(*argv,"-pre") == 0)
 			{
 			argc--; argv++;
+			if (argc == 0)
+				goto skip_arg_loop;
 			sk_push(pre_cmds,*argv);
 			}
 		else if (strcmp(*argv,"-post") == 0)
 			{
 			argc--; argv++;
+			if (argc == 0)
+				goto skip_arg_loop;
 			sk_push(post_cmds,*argv);
 			}
 		else if ((strncmp(*argv,"-h",2) == 0) ||