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-rw-r--r--linuxthreads/sysdeps/pthread/bits/libc-lock.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/linuxthreads/sysdeps/pthread/bits/libc-lock.h b/linuxthreads/sysdeps/pthread/bits/libc-lock.h
index 02dfc91692..2c1d162773 100644
--- a/linuxthreads/sysdeps/pthread/bits/libc-lock.h
+++ b/linuxthreads/sysdeps/pthread/bits/libc-lock.h
@@ -25,8 +25,12 @@
 /* Mutex type.  */
 #if defined(_LIBC) || defined(_IO_MTSAFE_IO)
 typedef pthread_mutex_t __libc_lock_t;
-typedef pthread_rwlock_t __libc_rwlock_t;
 typedef struct { pthread_mutex_t mutex; } __libc_lock_recursive_t;
+# ifdef __USE_UNIX98
+typedef pthread_rwlock_t __libc_rwlock_t;
+# else
+typedef struct __libc_rwlock_opaque__ __libc_rwlock_t;
+# endif
 #else
 typedef struct __libc_lock_opaque__ __libc_lock_t;
 typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;