diff --git a/arch/x86_64/bits/float.h b/arch/x86_64/bits/float.h
index 5ed6cbe3..17fd74d7 100644
--- a/arch/x86_64/bits/float.h
+++ b/arch/x86_64/bits/float.h
@@ -1,5 +1,9 @@
 #define FLT_ROUNDS 1
+#ifdef __FLT_EVAL_METHOD__
+#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
+#else
 #define FLT_EVAL_METHOD 0
+#endif
 
 #define LDBL_MIN     3.3621031431120935063e-4932L
 #define LDBL_MAX     1.1897314953572317650e+4932L