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-rw-r--r--src/thread/__lock.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/thread/__lock.c b/src/thread/__lock.c
index d1734096..5ba5dc5e 100644
--- a/src/thread/__lock.c
+++ b/src/thread/__lock.c
@@ -4,7 +4,7 @@ void __lock_2(volatile int *l)
{
if (!__syscall(SYS_futex, l, FUTEX_LOCK_PI, 0, 0))
return;
- int old, tid = __pthread_self()->tid;
+ int old, tid = __pthread_self()->tid|INT_MIN;
while ((old = a_cas(l, 0, tid))) {
a_cas(l, old, old|INT_MIN);
__syscall(SYS_futex, l, FUTEX_WAIT, old|INT_MIN, 0);