diff --git a/centreon/plugins/output.pm b/centreon/plugins/output.pm
index 5ebcc5dd3..87df5f003 100644
--- a/centreon/plugins/output.pm
+++ b/centreon/plugins/output.pm
@@ -310,7 +310,7 @@ sub output_txt {
         print (($options{nolabel} == 0 ? 'UNKNOWN: ' : '') . $self->{global_short_concat_outputs}->{UNKNOWN} . " ");
     }
     if (uc($options{exit_litteral}) eq 'OK') {
-        print (($options{nolabel} == 0 ? 'OK: ' : '') . $self->{global_short_concat_outputs}->{OK});
+        print (($options{nolabel} == 0 ? 'OK: ' : '') . $self->{global_short_concat_outputs}->{OK} . " ");
     }
 
     if ($force_ignore_perfdata == 1) {