diff --git a/os_dep/linux/ioctl_cfg80211.c b/os_dep/linux/ioctl_cfg80211.c
index feb651e..8ea6d3b 100644
--- a/os_dep/linux/ioctl_cfg80211.c
+++ b/os_dep/linux/ioctl_cfg80211.c
@@ -447,7 +447,7 @@ u8 rtw_cfg80211_ch_switch_notify(_adapter *adapter, u8 ch, u8 bw, u8 offset,
 	u8 ret = _SUCCESS;
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0))
-	struct cfg80211_chan_def chdef;
+	struct cfg80211_chan_def chdef = {};
 
 	ret = rtw_chbw_to_cfg80211_chan_def(wiphy, &chdef, ch, bw, offset, ht);
 	if (ret != _SUCCESS)