diff --git a/amd64/fenv.c b/amd64/fenv.c
index 0ed84c2..8eb8ed4 100644
--- a/amd64/fenv.c
+++ b/amd64/fenv.c
@@ -30,7 +30,7 @@
 #include "math_private.h"
 
 #ifdef _WIN32
-#define __fenv_static
+#define __fenv_static DLLEXPORT
 #endif
 #include <openlibm_fenv.h>