From 9b7d642c384e0d453dba8cdde219bf760b1a21ae Mon Sep 17 00:00:00 2001
From: Calvin Rose <calsrose@gmail.com>
Date: Thu, 12 Dec 2019 19:04:13 -0600
Subject: [PATCH] Window x86 needs isnan.

---
 src/core/thread.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/thread.c b/src/core/thread.c
index 06064bb2..b828f802 100644
--- a/src/core/thread.c
+++ b/src/core/thread.c
@@ -29,6 +29,7 @@
 
 #ifdef JANET_THREADS
 
+#include <math.h>
 #ifdef JANET_WINDOWS
 #include <windows.h>
 #else