diff --git a/deps/SoftFloat-3d-prebuilt/platform.h b/deps/SoftFloat-3d-prebuilt/platform.h
index d937c7f500..ef99e21b97 100644
--- a/deps/SoftFloat-3d-prebuilt/platform.h
+++ b/deps/SoftFloat-3d-prebuilt/platform.h
@@ -88,6 +88,10 @@
 #endif
 
 #define INLINE inline
+#if _MSC_VER
+#define THREAD_LOCAL __declspec(thread)
+#else
 #define THREAD_LOCAL __thread
+#endif
 
 #endif