diff --git a/src/contrib/delay-jitter-estimation.cc b/src/contrib/delay-jitter-estimation.cc
index 007359758..3904b16cc 100644
--- a/src/contrib/delay-jitter-estimation.cc
+++ b/src/contrib/delay-jitter-estimation.cc
@@ -73,7 +73,8 @@ void
 DelayJitterEstimation::RecordRx (Ptr<const Packet> packet)
 {
   TimestampTag tag;
-  bool found = packet->PeekTag (tag);
+  bool found;
+  found = packet->PeekTag (tag);
   NS_ASSERT (found);
   tag.GetTxTime ();