diff --git a/wpa_supplicant/wpa_supplicant_i.h b/wpa_supplicant/wpa_supplicant_i.h
index b327f4c65..54f5cc426 100644
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -591,9 +591,9 @@ struct wpa_supplicant {
 	struct gas_query *gas;
 
 #ifdef CONFIG_INTERWORKING
-	int fetch_anqp_in_progress:1;
-	int network_select:1;
-	int auto_select:1;
+	unsigned int fetch_anqp_in_progress:1;
+	unsigned int network_select:1;
+	unsigned int auto_select:1;
 #endif /* CONFIG_INTERWORKING */
 };