diff --git a/src/CalcManager/CEngine/scicomm.cpp b/src/CalcManager/CEngine/scicomm.cpp
index 918fd293..00ffccaa 100644
--- a/src/CalcManager/CEngine/scicomm.cpp
+++ b/src/CalcManager/CEngine/scicomm.cpp
@@ -16,8 +16,6 @@
 #include "Header Files/CalcEngine.h"
 #include "Header Files/CalcUtils.h"
 
-#include <iterator>
-
 #define IDC_RADSIN  IDC_UNARYLAST+1
 #define IDC_RADCOS  IDC_UNARYLAST+2
 #define IDC_RADTAN  IDC_UNARYLAST+3
diff --git a/src/CalcManager/CEngine/sciset.cpp b/src/CalcManager/CEngine/sciset.cpp
index 26f76c91..d5bbe9dd 100644
--- a/src/CalcManager/CEngine/sciset.cpp
+++ b/src/CalcManager/CEngine/sciset.cpp
@@ -4,8 +4,6 @@
 #include "pch.h"
 #include "Header Files/CalcEngine.h"
 
-#include <iterator>
-
 using namespace CalcEngine;
 using namespace CalcEngine::RationalMath;
 using namespace std;
diff --git a/src/CalcManager/pch.h b/src/CalcManager/pch.h
index 27e01ff3..4690713c 100644
--- a/src/CalcManager/pch.h
+++ b/src/CalcManager/pch.h
@@ -12,6 +12,7 @@
 #include <winerror.h>
 #include <sstream>
 #include <iostream>
+#include <iterator>
 #include <string>
 #include <memory>
 #include <vector>
diff --git a/src/CalcViewModel/Common/CopyPasteManager.cpp b/src/CalcViewModel/Common/CopyPasteManager.cpp
index 093fe604..71215d49 100644
--- a/src/CalcViewModel/Common/CopyPasteManager.cpp
+++ b/src/CalcViewModel/Common/CopyPasteManager.cpp
@@ -6,8 +6,6 @@
 #include "Common/TraceLogger.h"
 #include "Common/LocalizationSettings.h"
 
-#include <iterator>
-
 using namespace std;
 using namespace concurrency;
 using namespace CalculatorApp;
diff --git a/src/CalcViewModel/StandardCalculatorViewModel.cpp b/src/CalcViewModel/StandardCalculatorViewModel.cpp
index 3cd4967e..25f44b19 100644
--- a/src/CalcViewModel/StandardCalculatorViewModel.cpp
+++ b/src/CalcViewModel/StandardCalculatorViewModel.cpp
@@ -9,8 +9,6 @@
 #include "Common/CopyPasteManager.h"
 #include "Common/TraceLogger.h"
 
-#include <iterator>
-
 using namespace CalculatorApp;
 using namespace CalculatorApp::Common;
 using namespace CalculatorApp::Common::Automation;
diff --git a/src/CalcViewModel/pch.h b/src/CalcViewModel/pch.h
index b2717d17..1d03c5e5 100644
--- a/src/CalcViewModel/pch.h
+++ b/src/CalcViewModel/pch.h
@@ -26,7 +26,7 @@
 #include <sstream>
 #include <concrt.h>
 #include <regex>
-
+#include <iterator>
 // C++\WinRT Headers
 #include "winrt/base.h"
 #include "winrt/Windows.Foundation.Diagnostics.h"