diff --git a/src/netdev.c b/src/netdev.c
index 0e52ca36..a1ebdd35 100644
--- a/src/netdev.c
+++ b/src/netdev.c
@@ -2223,7 +2223,7 @@ static struct l_genl_msg *netdev_build_cmd_connect(struct netdev *netdev,
 						struct scan_bss *bss,
 						struct handshake_state *hs,
 						const uint8_t *prev_bssid,
-						struct iovec *vendor_ies,
+						const struct iovec *vendor_ies,
 						size_t num_vendor_ies)
 {
 	uint32_t auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
@@ -2386,7 +2386,7 @@ static int netdev_connect_common(struct netdev *netdev,
 
 int netdev_connect(struct netdev *netdev, struct scan_bss *bss,
 				struct handshake_state *hs,
-				struct iovec *vendor_ies,
+				const struct iovec *vendor_ies,
 				size_t num_vendor_ies,
 				netdev_event_func_t event_filter,
 				netdev_connect_cb_t cb, void *user_data)
diff --git a/src/netdev.h b/src/netdev.h
index 2d699c60..114a6035 100644
--- a/src/netdev.h
+++ b/src/netdev.h
@@ -146,7 +146,7 @@ struct handshake_state *netdev_get_handshake(struct netdev *netdev);
 
 int netdev_connect(struct netdev *netdev, struct scan_bss *bss,
 				struct handshake_state *hs,
-				struct iovec *vendor_ies,
+				const struct iovec *vendor_ies,
 				size_t num_vendor_ies,
 				netdev_event_func_t event_filter,
 				netdev_connect_cb_t cb, void *user_data);