diff --git a/src/proto_http.c b/src/proto_http.c
index f1ec7cd..694e98d 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -2245,7 +2245,7 @@
 			ptr = buf->data;
 	}
 
-	if (buf->l < bytes)
+	if (bytes > buf->l - buf->send_max)
 		return 0;
 
 	if (*ptr != '\n')