Index: plugins/check_radius.c
--- plugins/check_radius.c.orig
+++ plugins/check_radius.c
@@ -155,7 +155,7 @@ main (int argc, char **argv)
 {
 	struct sockaddr_storage ss;
 	char name[HOST_NAME_MAX];
-	char msg[BUFFER_LEN];
+	char msg[RC_BUFFER_LEN];
 	SEND_DATA data;
 	int result = STATE_UNKNOWN;
 	uint32_t client_id, service;