diff --git a/wpa_supplicant/hs20_supplicant.c b/wpa_supplicant/hs20_supplicant.c
index 1d1567768..d9604f62c 100644
--- a/wpa_supplicant/hs20_supplicant.c
+++ b/wpa_supplicant/hs20_supplicant.c
@@ -205,8 +205,8 @@ void hs20_put_anqp_req(u32 stypes, const u8 *payload, size_t payload_len,
 }
 
 
-struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
-				    size_t payload_len)
+static struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
+					   size_t payload_len)
 {
 	struct wpabuf *buf;
 
diff --git a/wpa_supplicant/hs20_supplicant.h b/wpa_supplicant/hs20_supplicant.h
index 89c47a536..69f8e9ea5 100644
--- a/wpa_supplicant/hs20_supplicant.h
+++ b/wpa_supplicant/hs20_supplicant.h
@@ -13,8 +13,6 @@ void wpas_hs20_add_indication(struct wpabuf *buf, int pps_mo_id);
 
 int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
 		       const u8 *payload, size_t payload_len, int inmem);
-struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
-				    size_t payload_len);
 void hs20_put_anqp_req(u32 stypes, const u8 *payload, size_t payload_len,
 		       struct wpabuf *buf);
 void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,