diff --git a/src/float_cast.h b/src/float_cast.h
index 0318427..b891b68 100644
--- a/src/float_cast.h
+++ b/src/float_cast.h
@@ -209,7 +209,7 @@
 		return res [1] ;
 	} /* double2int */
 
-#elif (defined (__MACH__) && defined (__APPLE__))
+#elif (defined (__MACH__) && defined (__APPLE__) && !defined(__aarch64__))
 
 	/* For Apple MacOSX. */