diff --git a/src/logs.js b/src/logs.js
index 342c5f1d4..da8b2e63b 100644
--- a/src/logs.js
+++ b/src/logs.js
@@ -16,6 +16,7 @@ class LogStream extends TransformStream {
         this._options = Object.assign({ source: 'unknown', format: 'json' }, options);
         this._decoder = new StringDecoder();
         this._soFar = '';
+        this._lastknownTimestamp = 0;
     }
 
     _format(line) {
@@ -23,8 +24,14 @@ class LogStream extends TransformStream {
 
         const data = line.split(' '); // logs are <ISOtimestamp> <msg>
         let timestamp = (new Date(data[0])).getTime();
-        if (isNaN(timestamp)) timestamp = 0;
-        const message = line.slice(data[0].length+1);
+        let message;
+        if (isNaN(timestamp)) {
+            timestamp = this._lastknownTimestamp;
+            message = line;
+        } else {
+            this._lastknownTimestamp = timestamp;
+            message = line.slice(data[0].length+1);
+        }
 
         return JSON.stringify({
             realtimeTimestamp: timestamp * 1000, // timestamp info can be missing (0) for app logs via logPaths