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-rw-r--r--nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h b/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h
index a2ad05dd54..df8beeb685 100644
--- a/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h
+++ b/nptl/sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h
@@ -79,7 +79,7 @@ typedef union
 # define __PTHREAD_MUTEX_HAVE_PREV	1
 #else
     unsigned int __nusers;
-    union
+    __extension__ union
     {
       int __spins;
       struct __pthread_mutex_s *__next;