diff --git a/js/src/api/format/output.js b/js/src/api/format/output.js
index 2fb684450..ca1d54ede 100644
--- a/js/src/api/format/output.js
+++ b/js/src/api/format/output.js
@@ -111,7 +111,7 @@ export function outPeers (peers) {
     active: outNumber(peers.active),
     connected: outNumber(peers.connected),
     max: outNumber(peers.max),
-    peers: peers.peers.map(p => { Object.keys(p.protocols).forEach(k => p.protocols[k].difficulty = outNumber(p.protocols[k].difficulty)); return p; })
+    peers: peers.peers.map(p => { Object.keys(p.protocols).forEach(k => { p.protocols[k].difficulty = outNumber(p.protocols[k].difficulty); }); return p; })
   };
 }