diff --git a/modules/fdlibm/src/math_private.h b/modules/fdlibm/src/math_private.h
index 51d79f9c2ec59..fafd7d6fc1e0d 100644
--- 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;