diff --git a/src/Conn.cc b/src/Conn.cc
index dc81cf045f..8f26a944a5 100644
--- a/src/Conn.cc
+++ b/src/Conn.cc
@@ -271,7 +271,8 @@ const RecordValPtr& Connection::GetVal()
 
 	conn_val->AssignTime(3, start_time); // ###
 	conn_val->AssignInterval(4, last_time - start_time);
-	conn_val->Assign(6, history);
+	if ( history.size() )
+		conn_val->Assign(6, history);
 
 	conn_val->SetOrigin(this);