1 files changed, 1 insertions, 4 deletions
diff --git a/win32/win32.c b/win32/win32.c
index 53f8dc9c25..72ca08f55e 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -1811,10 +1811,7 @@ rb_w32_fdclr(int fd, fd_set *set)
 int
 rb_w32_fdisset(int fd, fd_set *set)
 {
-    SOCKET s = TO_SOCKET(fd);
-    if (!is_socket(s))
-        return 0;
-    return __WSAFDIsSet(s, set);
+    return __WSAFDIsSet(TO_SOCKET(fd), set);
 }
 
 //