diff --git a/Eigen/src/Core/arch/Default/BFloat16.h b/Eigen/src/Core/arch/Default/BFloat16.h
index 4d5fa1bf8..95a84e488 100644
--- a/Eigen/src/Core/arch/Default/BFloat16.h
+++ b/Eigen/src/Core/arch/Default/BFloat16.h
@@ -551,16 +551,13 @@ EIGEN_STRONG_INLINE EIGEN_DEVICE_FUNC bfloat16 tanh(const bfloat16& a) {
 }
 #if EIGEN_HAS_CXX11_MATH
 EIGEN_STRONG_INLINE EIGEN_DEVICE_FUNC bfloat16 asinh(const bfloat16& a) {
-  EIGEN_USING_STD(asinhf);
-  return bfloat16(asinhf(float(a)));
+  return bfloat16(::asinhf(float(a)));
 }
 EIGEN_STRONG_INLINE EIGEN_DEVICE_FUNC bfloat16 acosh(const bfloat16& a) {
-  EIGEN_USING_STD(acoshf);
-  return bfloat16(acoshf(float(a)));
+  return bfloat16(::acoshf(float(a)));
 }
 EIGEN_STRONG_INLINE EIGEN_DEVICE_FUNC bfloat16 atanh(const bfloat16& a) {
-  EIGEN_USING_STD(atanhf);
-  return bfloat16(atanhf(float(a)));
+  return bfloat16(::atanhf(float(a)));
 }
 #endif
 EIGEN_STRONG_INLINE EIGEN_DEVICE_FUNC bfloat16 floor(const bfloat16& a) {