Index: src/options.c
===================================================================
--- src/options.c.orig
+++ src/options.c
@@ -40,6 +40,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <syslog.h>
 
 #ifdef HAVE_SECURITY_PAM_APPL_H
 #include <security/pam_appl.h>
@@ -354,7 +355,7 @@ _pam_krb5_options_init(pam_handle_t *pam
 	if (strlen(options->realm) > 0) {
 		krb5_set_default_realm(ctx, options->realm);
 		if (options->debug) {
-			debug("configured realm '%s'", options->realm);
+	  pam_syslog(pamh, LOG_DEBUG, "configured realm '%s'", options->realm);
 		}
 	}