diff --git a/src/activitypub/index.js b/src/activitypub/index.js
index 0fd721a34d..f9ff9c3507 100644
--- a/src/activitypub/index.js
+++ b/src/activitypub/index.js
@@ -235,7 +235,7 @@ ActivityPub.send = async (type, id, targets, payload) => {
 			if (String(response.statusCode).startsWith('2')) {
 				winston.verbose(`[activitypub/send] Successfully sent ${payload.type} to ${uri}`);
 			} else {
-				winston.warn(`[activitypub/send] Could not send ${payload.type} to ${uri}; error: ${body}`);
+				winston.warn(`[activitypub/send] Could not send ${payload.type} to ${uri}; error: ${String(body)}`);
 			}
 		} catch (e) {
 			winston.warn(`[activitypub/send] Could not send ${payload.type} to ${uri}; error: ${e.message}`);