diff --git a/socket/socket_quickack.c b/socket/socket_quickack.c
index 3dc1766..03d11aa 100644
--- a/socket/socket_quickack.c
+++ b/socket/socket_quickack.c
@@ -10,6 +10,8 @@ int socket_quickack(int s,int value) {
 #ifdef TCP_QUICKACK
   return setsockopt(s, SOL_TCP, TCP_QUICKACK, &value, sizeof(int));
 #else
+  (void)s;	// shut up unused variable warnings
+  (void)value;
 #ifdef ENOPROTOOPT
   errno=ENOPROTOOPT;
 #else