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-rw-r--r--sysdeps/mach/libc-lock.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/mach/libc-lock.h b/sysdeps/mach/libc-lock.h
index 23f6ed4e94..e2caa82b9b 100644
--- a/sysdeps/mach/libc-lock.h
+++ b/sysdeps/mach/libc-lock.h
@@ -53,6 +53,9 @@ typedef struct __libc_lock_opaque__ __libc_lock_t;
 /* Lock the named lock variable.  */
 #define __libc_lock_lock(NAME) __mutex_lock (&(NAME))
 
+/* Lock the named lock variable.  */
+#define __libc_lock_trylock(NAME) __mutex_trylock (&(NAME))
+
 /* Unlock the named lock variable.  */
 #define __libc_lock_unlock(NAME) __mutex_unlock (&(NAME))