diff --git a/src/libs/cplusplus/SimpleLexer.cpp b/src/libs/cplusplus/SimpleLexer.cpp
index f9549d3ca15..d6afc72e2b7 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 4d08bd7109f..07717905f9e 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 39b40a397bd..4ad7854d773 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 1c7a872689e..3d34ed26ef8 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 {