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-rw-r--r--libc/stdio/_stdio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libc/stdio/_stdio.c b/libc/stdio/_stdio.c
index 4aae3c418..c71de343d 100644
--- a/libc/stdio/_stdio.c
+++ b/libc/stdio/_stdio.c
@@ -162,7 +162,7 @@ int _stdio_openlist_delflag = 0;
/* 2 if threading not initialized and 0 otherwise; */
int _stdio_user_locking = 2;
-void __stdio_init_mutex(pthread_mutex_t *m)
+void attribute_hidden __stdio_init_mutex(pthread_mutex_t *m)
{
static const pthread_mutex_t __stdio_mutex_initializer
= PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;