diff --git a/source/arm11/open_agb_firm.c b/source/arm11/open_agb_firm.c
index c962cc7..5c16e9e 100644
--- a/source/arm11/open_agb_firm.c
+++ b/source/arm11/open_agb_firm.c
@@ -122,7 +122,7 @@ static KHandle g_frameReadyEvent = 0;
 static atp_error_t config_item( atp_callerdata_t data, atp_counter_t index, atp_itemcfg_t *cfg )
 {
 	const char *scaler_val[] = {"上屏无缩放", "上屏GPU放大", "上屏DMA放大", "下屏无缩放"};
-	char buf[32];
+	static char buf[16];
 	if( index == 0 )
 	{
 		ee_snprintf(buf, sizeof(buf), "%d", g_oafConfig.backlight);