diff --git a/src/kernel/qthread_unix.cpp b/src/kernel/qthread_unix.cpp
index 5a6ad877..0c1790c2 100644
--- a/src/kernel/qthread_unix.cpp
+++ b/src/kernel/qthread_unix.cpp
@@ -331,7 +331,10 @@ void TQThread::start(Priority priority)
     pthread_attr_init(&attr);
     pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 
-#if !defined(Q_OS_OPENBSD) && defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && (_POSIX_THREAD_PRIORITY_SCHEDULING-0 >= 0)
+#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && (_POSIX_THREAD_PRIORITY_SCHEDULING-0 >= 0)
+#if _POSIX_THREAD_PRIORITY_SCHEDULING == 0 && defined _SC_THREAD_PRIORITY_SCHEDULING
+    if (sysconf(_SC_THREAD_PRIORITY_SCHEDULING) > 0)
+#endif
     switch (priority) {
     case InheritPriority:
 	{