diff --git a/include/internal.h b/include/internal.h
index 831124f..ae8e86a 100644
--- a/include/internal.h
+++ b/include/internal.h
@@ -34,21 +34,6 @@
 #include <sys/types.h>
 #include <sys/time.h>
 
-#ifndef POST_PACKED_STRUCTURE
-#ifdef __GNUC__
-/* POST_PACKED_STRUCTURE needs to be a macro which
-   expands into a compiler directive. The directive must
-   tell the compiler to arrange the preceding structure
-   declaration so that it is packed on byte-boundaries rather 
-   than use the natural alignment of the processor and/or
-   compiler.
-*/
-#define POST_PACKED_STRUCTURE __attribute__((__packed__))
-#else
-/* Add other things here for non-gcc platforms */
-#endif
-#endif
-
 /* Needed by <sysdeps/time.h> */
 extern void jack_error (const char *fmt, ...);
 
diff --git a/include/port.h b/include/port.h
index 840d9ed..9ddcc1c 100644
--- a/include/port.h
+++ b/include/port.h
@@ -54,21 +54,6 @@ typedef int32_t jack_port_type_id_t;
 
 #define JACK_BACKEND_ALIAS "system"
 
-#ifndef POST_PACKED_STRUCTURE
-#ifdef __GNUC__
-/* POST_PACKED_STRUCTURE needs to be a macro which
-   expands into a compiler directive. The directive must
-   tell the compiler to arrange the preceding structure
-   declaration so that it is packed on byte-boundaries rather 
-   than use the natural alignment of the processor and/or
-   compiler.
-*/
-#define POST_PACKED_STRUCTURE __attribute__((__packed__))
-#else
-/* Add other things here for non-gcc platforms */
-#endif
-#endif
-
 /* Port type structure.  
  *
  *  (1) One for each port type is part of the engine's jack_control_t
diff --git a/jack b/jack
index a14583e..aea850a 160000
--- a/jack
+++ b/jack
@@ -1 +1 @@
-Subproject commit a14583ed99d346dacd6579d2d06e273a0c834b24
+Subproject commit aea850adb32b5b5e977ec8b571c06cf99a4e206f