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-rw-r--r--nptl/pthreadP.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 06fb0d74c5..c4e72f57a9 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -482,6 +482,8 @@ extern void __pthread_testcancel (void);
 extern int __pthread_clockjoin_ex (pthread_t, void **, clockid_t,
 				   const struct timespec *, bool)
   attribute_hidden;
+extern int __pthread_sigmask (int, const sigset_t *, sigset_t *);
+libc_hidden_proto (__pthread_sigmask);
 
 
 #if IS_IN (libpthread)