--- a/ost_main.c
+++ b/ost_main.c
@@ -788,7 +788,7 @@ void Hup_Handler(int sig)
 int main(int argc, char *argv[])
 {
   int i, listen_sock, clnt_sock, success;
-  size_t struct_len;
+  socklen_t struct_len;
   char hash_out_buf[HASH_TEXT_SIZE]; /* for debug output */
 #if HAVE_SIGACTION
   struct sigaction sigact;