diff --git a/src/htsp_server.c b/src/htsp_server.c
index c3c1420f..a56bb83e 100644
--- a/src/htsp_server.c
+++ b/src/htsp_server.c
@@ -2246,7 +2246,7 @@ static int
 htsp_read_message(htsp_connection_t *htsp, htsmsg_t **mp, int timeout)
 {
   int v;
-  size_t len;
+  uint32_t len;
   uint8_t data[4];
   void *buf;