--- a/modules/fdlibm/src/math_private.h
+++ b/modules/fdlibm/src/math_private.h
@@ -30,7 +30,11 @@
  * Adapted from https://github.com/freebsd/freebsd-src/search?q=__double_t
  */
 
+#if defined(__FLT_EVAL_METHOD__) && (__FLT_EVAL_METHOD__ == 2)
+typedef long double __double_t;
+#else
 typedef double __double_t;
+#endif
 typedef __double_t double_t;
 typedef float __float_t;
 typedef __float_t float_t;