1 files changed, 2 insertions, 2 deletions

diff --git a/plugins/check_users.c b/plugins/check_users.c
index a10249c4..f6f4b362 100644
--- a/plugins/check_users.c
+++ b/plugins/check_users.c
@@ -222,9 +222,9 @@ process_arguments (int argc, char **argv)
         /* this will abort in case of invalid ranges */
         set_thresholds (&thlds, warning_range, critical_range);
 
-        if (thlds->warning->end <= 0)
+        if (thlds->warning->end < 0)
                 usage4 (_("Warning threshold must be a positive integer"));
-        if (thlds->critical->end <= 0)
+        if (thlds->critical->end < 0)
                 usage4 (_("Critical threshold must be a positive integer"));
 
         return OK;