diff --git a/src/wps/wps_enrollee.c b/src/wps/wps_enrollee.c
index f7d41b4de..9f5a90ce9 100644
--- a/src/wps/wps_enrollee.c
+++ b/src/wps/wps_enrollee.c
@@ -175,6 +175,12 @@ static struct wpabuf * wps_build_m3(struct wps_data *wps)
 	}
 	wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
 
+	if (wps->wps->ap && random_pool_ready() != 1) {
+		wpa_printf(MSG_INFO,
+			   "WPS: Not enough entropy in random pool to proceed - do not allow AP PIN to be used");
+		return NULL;
+	}
+
 	msg = wpabuf_alloc(1000);
 	if (msg == NULL)
 		return NULL;
@@ -268,8 +274,12 @@ static int wps_build_cred_network_key(struct wps_data *wps, struct wpabuf *msg)
 		char hex[65];
 		u8 psk[32];
 		/* Generate a random per-device PSK */
-		if (random_get_bytes(psk, sizeof(psk)) < 0)
+		if (random_pool_ready() != 1 ||
+		    random_get_bytes(psk, sizeof(psk)) < 0) {
+			wpa_printf(MSG_INFO,
+				   "WPS: Could not generate random PSK");
 			return -1;
+		}
 		wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
 				psk, sizeof(psk));
 		wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%u)",
diff --git a/src/wps/wps_registrar.c b/src/wps/wps_registrar.c
index 00c8299ac..b90cc25e4 100644
--- a/src/wps/wps_registrar.c
+++ b/src/wps/wps_registrar.c
@@ -1640,8 +1640,12 @@ int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
 	    !wps->wps->registrar->disable_auto_conf) {
 		u8 r[16];
 		/* Generate a random passphrase */
-		if (random_get_bytes(r, sizeof(r)) < 0)
+		if (random_pool_ready() != 1 ||
+		    random_get_bytes(r, sizeof(r)) < 0) {
+			wpa_printf(MSG_INFO,
+				   "WPS: Could not generate random PSK");
 			return -1;
+		}
 		os_free(wps->new_psk);
 		wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
 		if (wps->new_psk == NULL)
@@ -1674,7 +1678,10 @@ int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
 		wps->new_psk = os_malloc(wps->new_psk_len);
 		if (wps->new_psk == NULL)
 			return -1;
-		if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
+		if (random_pool_ready() != 1 ||
+		    random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
+			wpa_printf(MSG_INFO,
+				   "WPS: Could not generate random PSK");
 			os_free(wps->new_psk);
 			wps->new_psk = NULL;
 			return -1;