diff --git a/src/ap/wpa_auth_glue.c b/src/ap/wpa_auth_glue.c
index 7ca292530..3e9921553 100644
--- a/src/ap/wpa_auth_glue.c
+++ b/src/ap/wpa_auth_glue.c
@@ -1553,7 +1553,8 @@ int hostapd_setup_wpa(struct hostapd_data *hapd)
 		return -1;
 	}
 
-	hapd->ptksa = ptksa_cache_init();
+	if (!hapd->ptksa)
+		hapd->ptksa = ptksa_cache_init();
 	if (!hapd->ptksa) {
 		wpa_printf(MSG_ERROR, "Failed to allocate PTKSA cache");
 		return -1;