diff --git a/transport.h b/transport.h
index 0f57a8c..9639abf 100644
--- a/transport.h
+++ b/transport.h
@@ -28,22 +28,6 @@ extern "C" {
 #include <jack/types.h>
 #include <jack/weakmacros.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
-
-
 /**
  * Transport states.
  */
diff --git a/types.h b/types.h
index c6f0905..1e17917 100644
--- a/types.h
+++ b/types.h
@@ -29,6 +29,22 @@ typedef uint64_t jack_uuid_t;
 
 typedef int32_t jack_shmsize_t;
 
+#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
+
+
 /**
  * Type used to represent sample frame counts.
  */