diff --git a/lib/instrumentation/span.js b/lib/instrumentation/span.js
index <HASH>..<HASH> 100644
--- a/lib/instrumentation/span.js
+++ b/lib/instrumentation/span.js
@@ -122,10 +122,9 @@ Span.prototype._encode = function (cb) {
       timestamp: self.timestamp,
       duration: self.duration(),
       context: undefined,
-      stacktrace: undefined
+      stacktrace: frames
     }
 
-    if (frames) payload.stacktrace = frames
     if (self._db || self._tags) {
       payload.context = {
         db: self._db || undefined,
refactor: improve span payload encoding (#<I>)