diff --git a/include/cmath b/include/cmath
index 724935623..be3c3ee76 100644
--- a/include/cmath
+++ b/include/cmath
@@ -495,7 +495,7 @@ using ::cbrtl;
 
 using ::copysignl;
 
-#ifndef _LIBCPP_MSVCRT
+#if !defined(_LIBCPP_MSVCRT) || (_VC_CRT_MAJOR_VERSION-0) >= 14
 using ::erfl;
 using ::erfcl;
 using ::exp2l;
@@ -526,7 +526,7 @@ using ::scalblnl;
 using ::scalbnl;
 using ::tgammal;
 using ::truncl;
-#endif // !_LIBCPP_MSVCRT
+#endif // !defined(_LIBCPP_MSVCRT) || (_VC_CRT_MAJOR_VERSION-0) >= 14
 
 #if _LIBCPP_STD_VER > 14
 inline _LIBCPP_INLINE_VISIBILITY float       hypot(       float x,       float y,       float z ) { return sqrt(x*x + y*y + z*z); }