diff --git a/syslog-ng/install_check.pl b/syslog-ng/install_check.pl
index 2f36abe37..5155e722c 100755
--- a/syslog-ng/install_check.pl
+++ b/syslog-ng/install_check.pl
@@ -10,6 +10,7 @@ sub is_installed
 {
 return 0 if (!&get_syslog_ng_version());
 return 0 if (!-r $config{'syslogng_conf'});
-return $_[0] ? 2 : 1;
+return 1 if ($_[0]);
+return &is_syslog_ng_running() ? 2 : 1;
 }