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-rw-r--r--mach/spin-lock.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mach/spin-lock.c b/mach/spin-lock.c
index 888eb9d708..e5c730d7fb 100644
--- a/mach/spin-lock.c
+++ b/mach/spin-lock.c
@@ -12,4 +12,5 @@ weak_alias (__spin_unlock, spin_unlock);
 libc_hidden_def (__spin_try_lock);
 weak_alias (__spin_try_lock, spin_try_lock);
 libc_hidden_def (__mutex_lock);
+libc_hidden_def (__mutex_unlock);
 libc_hidden_def (__mutex_trylock);