diff --git a/examples/wifi-wired-bridging.cc b/examples/wifi-wired-bridging.cc
index e6d263e94..c43bc8ca6 100644
--- a/examples/wifi-wired-bridging.cc
+++ b/examples/wifi-wired-bridging.cc
@@ -10,6 +10,7 @@
 #include <vector>
 #include <stdint.h>
 #include <sstream>
+#include <fstream>
 
 using namespace ns3;
 
diff --git a/src/simulator/default-simulator-impl.h b/src/simulator/default-simulator-impl.h
index 37396214f..fe1c467de 100644
--- a/src/simulator/default-simulator-impl.h
+++ b/src/simulator/default-simulator-impl.h
@@ -22,7 +22,6 @@
 #define DEFAULT_SIMULATOR_IMPL_H
 
 #include "simulator-impl.h"
-
 #include "scheduler.h"
 #include "event-impl.h"
 
@@ -31,7 +30,6 @@
 #include "ns3/log.h"
 
 #include <list>
-#include <fstream>
 
 namespace ns3 {
 
diff --git a/src/simulator/realtime-simulator-impl.h b/src/simulator/realtime-simulator-impl.h
index a56a21031..f046498f3 100644
--- a/src/simulator/realtime-simulator-impl.h
+++ b/src/simulator/realtime-simulator-impl.h
@@ -31,7 +31,6 @@
 #include "ns3/system-mutex.h"
 
 #include <list>
-#include <fstream>
 
 namespace ns3 {