diff --git a/src/libs/cplusplus/SimpleLexer.cpp b/src/libs/cplusplus/SimpleLexer.cpp
index f9549d3ca15185f871bfeaf78005e7a096a3b558..d6afc72e2b70e3e3f2054d253b9935374adc91f6 100644
--- a/src/libs/cplusplus/SimpleLexer.cpp
+++ b/src/libs/cplusplus/SimpleLexer.cpp
@@ -27,9 +27,10 @@
 **
 **************************************************************************/
 
-#include "ObjectiveCTypeQualifiers.h"
 #include "SimpleLexer.h"
 
+#include "ObjectiveCTypeQualifiers.h"
+
 #include <Lexer.h>
 #include <Token.h>
 #include <QtDebug>
diff --git a/src/libs/cplusplus/TypePrettyPrinter.cpp b/src/libs/cplusplus/TypePrettyPrinter.cpp
index 4d08bd7109fd2025ea1342efbfbbf793ad9af7a6..07717905f9efd28b3000931e23179932d65dc9bf 100644
--- a/src/libs/cplusplus/TypePrettyPrinter.cpp
+++ b/src/libs/cplusplus/TypePrettyPrinter.cpp
@@ -27,8 +27,9 @@
 **
 **************************************************************************/
 
-#include "Overview.h"
 #include "TypePrettyPrinter.h"
+
+#include "Overview.h"
 #include <FullySpecifiedType.h>
 #include <Literals.h>
 #include <CoreTypes.h>
diff --git a/src/libs/cplusplus/pp-engine.cpp b/src/libs/cplusplus/pp-engine.cpp
index 39b40a397bdc3fd67836114c415b5ab9633f0ef6..4ad7854d773944074c9c3ceecd89a74d39fc3982 100644
--- a/src/libs/cplusplus/pp-engine.cpp
+++ b/src/libs/cplusplus/pp-engine.cpp
@@ -56,7 +56,6 @@
 
 #include <QtDebug>
 #include <algorithm>
-#include <cctype>
 
 namespace CPlusPlus {
 
diff --git a/src/libs/cplusplus/pp-macro-expander.cpp b/src/libs/cplusplus/pp-macro-expander.cpp
index 1c7a872689eafcda93e4042e9df7a540dcb834a3..3d34ed26ef89d3842376396886a779d4787f9dc5 100644
--- a/src/libs/cplusplus/pp-macro-expander.cpp
+++ b/src/libs/cplusplus/pp-macro-expander.cpp
@@ -27,9 +27,10 @@
 **
 **************************************************************************/
 
+#include "pp-macro-expander.h"
+
 #include "pp.h"
 #include "pp-cctype.h"
-#include "pp-macro-expander.h"
 #include <QDateTime>
 
 namespace CPlusPlus {