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Diffstat (limited to 'src/thread/pthread_mutex_init.c')
-rw-r--r--src/thread/pthread_mutex_init.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/thread/pthread_mutex_init.c b/src/thread/pthread_mutex_init.c
index 9d85a354..b83edd0f 100644
--- a/src/thread/pthread_mutex_init.c
+++ b/src/thread/pthread_mutex_init.c
@@ -3,6 +3,7 @@
 int pthread_mutex_init(pthread_mutex_t *restrict m, const pthread_mutexattr_t *restrict a)
 {
 	*m = (pthread_mutex_t){0};
-	if (a) m->_m_type = a->__attr & 7;
+	if (a) m->_m_type = a->__attr;
+	if (m->_m_type & 4) m->_m_type |= 128U;
 	return 0;
 }