diff --git a/components/wpa_supplicant/src/common/wpa_common.h b/components/wpa_supplicant/src/common/wpa_common.h
index d682f29bd0..d4d164db0c 100644
--- a/components/wpa_supplicant/src/common/wpa_common.h
+++ b/components/wpa_supplicant/src/common/wpa_common.h
@@ -290,7 +290,7 @@ struct rsn_error_kde {
 struct wpa_igtk_kde {
 	u8 keyid[2];
 	u8 pn[6];
-	u8 igtk[WPA_IGTK_LEN];
+	u8 igtk[WPA_IGTK_MAX_LEN];
 } STRUCT_PACKED;
 #endif /* CONFIG_IEEE80211W */