X-Git-Url: http://git.meshlink.io/?p=utcp;a=blobdiff_plain;f=utcp.c;fp=utcp.c;h=6279d925a781814eeb06710c406fa47063c2f052;hp=75d4f83417a3be30bccc6346757abef8f7643585;hb=9fe3be0ad54dd1e0c8766957ea402d555d947839;hpb=9809749c054e9beb9b01aa4e7e2f597871da133c

diff --git a/utcp.c b/utcp.c
index 75d4f83..6279d92 100644
--- a/utcp.c
+++ b/utcp.c
@@ -401,7 +401,7 @@ static void buffer_exit(struct buffer *buf) {
 }
 
 static uint32_t buffer_free(const struct buffer *buf) {
-	return buf->maxsize - buf->used;
+	return buf->maxsize > buf->used ? buf->maxsize - buf->used : 0;
 }
 
 // Connections are stored in a sorted list.