1 files changed, 4 insertions, 1 deletions

diff --git a/plugins/check_nt.c b/plugins/check_nt.c
index 65c4e69..b9aae1c 100644
--- a/plugins/check_nt.c
+++ b/plugins/check_nt.c
@@ -505,13 +505,16 @@ int process_arguments(int argc, char **argv){
 
         }
 
+        if (vars_to_check==CHECK_NONE)
+                return ERROR;
+
         return OK;
 }
 
 
 void print_usage(void)
 {
-        printf("Usage: %s -H host [-p port] [-v variable] [-w warning] [-c critical] [-l params] [-d SHOWALL] [-t timeout]\n",progname);
+        printf("Usage: %s -H host -v variable [-p port] [-w warning] [-c critical] [-l params] [-d SHOWALL] [-t timeout]\n",progname);
 }