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-rw-r--r--nptl/sysdeps/pthread/bits/libc-lock.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/nptl/sysdeps/pthread/bits/libc-lock.h b/nptl/sysdeps/pthread/bits/libc-lock.h
index f19281e999..3a3d3cc6d3 100644
--- a/nptl/sysdeps/pthread/bits/libc-lock.h
+++ b/nptl/sysdeps/pthread/bits/libc-lock.h
@@ -340,7 +340,7 @@ typedef pthread_key_t __libc_key_t;
PTF(__pthread_once) (&(ONCE_CONTROL), INIT_FUNCTION); \
else if ((ONCE_CONTROL) == PTHREAD_ONCE_INIT) { \
INIT_FUNCTION (); \
- (ONCE_CONTROL) = !PTHREAD_ONCE_INIT; \
+ (ONCE_CONTROL) |= 2; \
} \
} while (0)