diff --git a/Eigen/src/Core/arch/Default/Half.h b/Eigen/src/Core/arch/Default/Half.h
index bf408149a..0bc1e9d19 100644
--- a/Eigen/src/Core/arch/Default/Half.h
+++ b/Eigen/src/Core/arch/Default/Half.h
@@ -774,7 +774,7 @@ template<> struct NumTraits<Eigen::half>
 
 } // end namespace Eigen
 
-#if defined(EIGEN_HAS_GPU_FP16)
+#if defined(EIGEN_HAS_GPU_FP16) || defined(EIGEN_HAS_ARM64_FP16_SCALAR_ARITHMETIC)
   #pragma pop_macro("EIGEN_CONSTEXPR")
 #endif