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-rw-r--r--src/thread/pthread_mutex_unlock.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c
index 61a2b947..3733788d 100644
--- a/src/thread/pthread_mutex_unlock.c
+++ b/src/thread/pthread_mutex_unlock.c
@@ -3,7 +3,7 @@
int pthread_mutex_unlock(pthread_mutex_t *m)
{
if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
- if (m->_m_lock != pthread_self()->tid)
+ if (!m->_m_lock || m->_m_lock != __pthread_self()->tid)
return EPERM;
if (m->_m_type == PTHREAD_MUTEX_RECURSIVE && --m->_m_count)
return 0;