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-rw-r--r--src/kernel/ao.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/kernel/ao.h b/src/kernel/ao.h
index 56945bf5..50fd065f 100644
--- a/src/kernel/ao.h
+++ b/src/kernel/ao.h
@@ -667,7 +667,7 @@ extern __xdata union ao_monitor ao_monitor_ring[AO_MONITOR_RING];
#define ao_monitor_ring_next(n) (((n) + 1) & (AO_MONITOR_RING - 1))
#define ao_monitor_ring_prev(n) (((n) - 1) & (AO_MONITOR_RING - 1))
-extern __data uint8_t ao_monitoring_mutex;
+extern __xdata uint8_t ao_monitoring_mutex;
extern __data uint8_t ao_monitoring;
extern __data uint8_t ao_monitor_head;