1 files changed, 8 insertions, 0 deletions
diff --git a/c/src/tests/psxtests/psx05/init.c b/c/src/tests/psxtests/psx05/init.c
index 08b059310f..e89286fac8 100644
--- a/c/src/tests/psxtests/psx05/init.c
+++ b/c/src/tests/psxtests/psx05/init.c
@@ -269,6 +269,14 @@ void *POSIX_Init(
   status = pthread_mutexattr_init( &attr );
   assert( !status );
 
+  /*
+   *  Set the protocol to priority ceiling so the owner check happens
+   *  and the EPERM test (later) will work.
+   */
+
+  status = pthread_mutexattr_setprotocol( &attr, PTHREAD_PRIO_INHERIT );
+  assert( !status );
+ 
   puts( "Init: pthread_mutex_init - SUCCESSFUL" );
   status = pthread_mutex_init( &Mutex_id, &attr );
   if ( status )