diff --git a/systemdeps.h b/systemdeps.h
index 1a11192..84b4ce3 100644
--- a/systemdeps.h
+++ b/systemdeps.h
@@ -124,10 +124,10 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
 #endif /* __APPLE__ || __linux__ || __sun__ || sun */
 
-#if defined(__arm__) || defined(__aarch64__) || defined(__mips__) || defined(__ppc__) || defined(__powerpc__)
+#if (defined(__arm__) || defined(__aarch64__) || defined(__mips__) || defined(__ppc__) || defined(__powerpc__)) && !defined(__APPLE__)
     #undef POST_PACKED_STRUCTURE
     #define POST_PACKED_STRUCTURE
-#endif /* __arm__ || __aarch64__ || __ppc__ || __powerpc__ */
+#endif /* __arm__ || __aarch64__ || __mips__ || __ppc__ || __powerpc__ */
 
 /** define JACK_LIB_EXPORT, useful for internal clients */
 #if defined(_WIN32)