diff --git a/core/rtw_efuse.c b/core/rtw_efuse.c
index 327e343..764b045 100644
--- a/core/rtw_efuse.c
+++ b/core/rtw_efuse.c
@@ -599,7 +599,7 @@ u8 rtw_efuse_map_write(struct adapter *padapter, u16 addr, u16 cnts, u8 *data)
 {
 	u8 offset, word_en;
 	u8 *map;
-	u8 newdata[PGPKT_DATA_SIZE];
+	u8 newdata[PGPKT_DATA_SIZE + 1];
 	s32	i, idx;
 	u8 ret = _SUCCESS;
 	u16 mapLen = 0;
@@ -691,7 +691,7 @@ u8 rtw_BT_efuse_map_write(struct adapter *padapter, u16 addr, u16 cnts, u8 *data
 {
 	u8 offset, word_en;
 	u8 *map;
-	u8 newdata[PGPKT_DATA_SIZE];
+	u8 newdata[PGPKT_DATA_SIZE + 1];
 	s32	i, idx;
 	u8 ret = _SUCCESS;
 	u16 mapLen = 0;