diff --git a/src/catch2/internal/catch_random_integer_helpers.hpp b/src/catch2/internal/catch_random_integer_helpers.hpp
index 10d82559..cb5e004f 100644
--- a/src/catch2/internal/catch_random_integer_helpers.hpp
+++ b/src/catch2/internal/catch_random_integer_helpers.hpp
@@ -21,7 +21,10 @@
 //       it, and it provides an escape hatch to the users who need it.
 #if defined( __SIZEOF_INT128__ )
 #    define CATCH_CONFIG_INTERNAL_UINT128
-#elif defined( _MSC_VER ) && ( defined( _WIN64 ) || defined( _M_ARM64 ) )
+// Unlike GCC, MSVC does not polyfill umul as mulh + mul pair on ARM machines.
+// Currently we do not bother doing this ourselves, but we could if it became
+// important for perf.
+#elif defined( _MSC_VER ) && defined( _M_X64 )
 #    define CATCH_CONFIG_INTERNAL_MSVC_UMUL128
 #endif
 
@@ -36,7 +39,6 @@
     !defined( CATCH_CONFIG_MSVC_UMUL128 )
 #    define CATCH_CONFIG_MSVC_UMUL128
 #    include <intrin.h>
-#    pragma intrinsic( _umul128 )
 #endif