@@ -24,14 +24,10 @@
 # include "threading_winapi.m"
 #else
 # error No threads available!
 #endif
 
-#ifdef OF_HAIKU
-# include <kernel/OS.h>
-#endif
-
 bool
 of_rmutex_new(of_rmutex_t *rmutex)
 {
 #if defined(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES)
 	pthread_mutexattr_t attr;