diff -Naubr nagios-plugins-1.4.13.old/plugins/check_mrtg.c nagios-plugins-1.4.13.new/plugins/check_mrtg.c
--- nagios-plugins-1.4.13.old/plugins/check_mrtg.c	2008-05-07 12:02:42.000000000 +0200
+++ nagios-plugins-1.4.13.new/plugins/check_mrtg.c	2008-12-02 16:50:55.000000000 +0100
@@ -57,7 +57,7 @@
 int
 main (int argc, char **argv)
 {
-	int result = STATE_UNKNOWN;
+	int result = STATE_OK;
 	FILE *fp;
 	int line;
 	char input_buffer[MAX_INPUT_BUFFER];