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-rw-r--r--libio/libio.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libio/libio.h b/libio/libio.h
index 17cef91121..36e839fa32 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -152,6 +152,7 @@ typedef struct
#ifdef _IO_MTSAFE_IO
#include <pthread.h>
typedef pthread_mutex_t _IO_lock_t;
+#define _IO_lock_init PTHREAD_MUTEX_INITIALIZER
#else
typedef void _IO_lock_t;
#endif