Index: src/OFThread.h
==================================================================
--- src/OFThread.h
+++ src/OFThread.h
@@ -75,11 +75,15 @@
  * To use it, you should create a new class derived from it and reimplement
  * main.
  */
 @interface OFThread: OFObject
 {
+#ifdef OF_THREAD_M
 @public
+#else
+@private
+#endif
 	id object;
 	of_thread_t thread;
 	enum {
 		OF_THREAD_NOT_RUNNING,
 		OF_THREAD_RUNNING,

Index: src/OFThread.m
==================================================================
--- src/OFThread.m
+++ src/OFThread.m
@@ -13,10 +13,12 @@
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
 
 #include "config.h"
+
+#define OF_THREAD_M
 
 #define __NO_EXT_QNX
 
 #include <math.h>