diff --git a/check_rbl b/check_rbl
index ba271da..a741dc2 100644
--- a/check_rbl
+++ b/check_rbl
@@ -151,7 +151,7 @@ sub init_dns_resolver {
           capture { $resolver->nameservers( $options->nameserver ); };
 
         if ( @servers == 0 ) {
-            debuglog("DNS nameserver error: $stderr");
+            debug("DNS nameserver error: $stderr");
             $plugin->nagios_exit( Monitoring::Plugin->CRITICAL,
                 'Invalid nameserver ' . $options->nameserver );
         }