diff --git a/ext/socket/init.c b/ext/socket/init.c
index 24b9b00e15..ba4b084837 100644
--- a/ext/socket/init.c
+++ b/ext/socket/init.c
@@ -481,6 +481,7 @@ rsock_socket0(int domain, int type, int proto)
     if (ret == -1)
         return -1;
     rb_fd_fix_cloexec(ret);
+    rsock_make_fd_nonblock(ret);
 
     return ret;
 }