diff --git a/src/server.c b/src/server.c
index 222e6cab..a968a2bc 100644
--- a/src/server.c
+++ b/src/server.c
@@ -307,7 +307,7 @@ setfastopen(int fd)
     int s = 0;
 #ifdef TCP_FASTOPEN
     if (fast_open) {
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(__MINGW32__)
         int opt = 1;
 #else
         int opt = 5;