diff --git a/examples/interference-pattern/sim.cc b/examples/interference-pattern/sim.cc
index 5021c293d6..c849b0b961 100644
--- a/examples/interference-pattern/sim.cc
+++ b/examples/interference-pattern/sim.cc
@@ -18,6 +18,8 @@
  * Author: Piotr Gawlowicz <gawlowicz@tkn.tu-berlin.de>
  */
 
+#include "mygym.h"
+
 #include "ns3/core-module.h"
 #include "ns3/applications-module.h"
 #include "ns3/packet-sink.h"
@@ -28,8 +30,6 @@
 #include "ns3/stats-module.h"
 #include "ns3/flow-monitor-module.h"
 
-#include "mygym.h"
-
 using namespace ns3;
 
 NS_LOG_COMPONENT_DEFINE ("Interference-Pattern");