diff --git a/src/plugins/cpptools/cppcodeformatter.cpp b/src/plugins/cpptools/cppcodeformatter.cpp
index e27832a2ffd..68c83f29f9a 100644
--- a/src/plugins/cpptools/cppcodeformatter.cpp
+++ b/src/plugins/cpptools/cppcodeformatter.cpp
@@ -40,18 +40,6 @@ using namespace CppTools;
 using namespace TextEditor;
 using namespace CppTools::Internal;
 
-CodeFormatter::BlockData::BlockData()
-    : m_blockRevision(-1)
-{
-}
-
-CodeFormatter::CodeFormatter()
-    : m_indentDepth(0)
-    , m_paddingDepth(0)
-    , m_tabSize(4)
-{
-}
-
 CodeFormatter::~CodeFormatter()
 {
 }
diff --git a/src/plugins/cpptools/cppcodeformatter.h b/src/plugins/cpptools/cppcodeformatter.h
index e48199d3a38..86accb647ab 100644
--- a/src/plugins/cpptools/cppcodeformatter.h
+++ b/src/plugins/cpptools/cppcodeformatter.h
@@ -48,7 +48,6 @@ class CPPTOOLS_EXPORT CodeFormatter
 {
     Q_GADGET
 public:
-    CodeFormatter();
     virtual ~CodeFormatter();
 
     // updates all states up until block if necessary
@@ -73,13 +72,11 @@ protected:
     class BlockData
     {
     public:
-        BlockData();
-
         QStack<State> m_beginState;
         QStack<State> m_endState;
-        int m_indentDepth;
-        int m_paddingDepth;
-        int m_blockRevision;
+        int m_indentDepth = 0;
+        int m_paddingDepth = 0;
+        int m_blockRevision = -1;
     };
 
     virtual void saveBlockData(QTextBlock *block, const BlockData &data) const = 0;
@@ -242,12 +239,12 @@ private:
     CPlusPlus::Tokens m_tokens;
     QString m_currentLine;
     CPlusPlus::Token m_currentToken;
-    int m_tokenIndex;
+    int m_tokenIndex = 0;
 
-    int m_indentDepth;
-    int m_paddingDepth;
+    int m_indentDepth = 0;
+    int m_paddingDepth = 0;
 
-    int m_tabSize;
+    int m_tabSize = 4;
 
     friend class Internal::CppCodeFormatterData;
 };
diff --git a/src/plugins/cpptools/cppcompletionassist.cpp b/src/plugins/cpptools/cppcompletionassist.cpp
index 6a5e70954d2..0a31d52b848 100644
--- a/src/plugins/cpptools/cppcompletionassist.cpp
+++ b/src/plugins/cpptools/cppcompletionassist.cpp
@@ -83,9 +83,6 @@ struct CompleteFunctionDeclaration
 class CppAssistProposalItem final : public AssistProposalItem
 {
 public:
-    CppAssistProposalItem() :
-        m_isOverloaded(false) {}
-
     ~CppAssistProposalItem() Q_DECL_NOEXCEPT {}
     bool prematurelyApplies(const QChar &c) const override;
     void applyContextualContent(TextDocumentManipulatorInterface &manipulator, int basePosition) const override;
@@ -101,9 +98,9 @@ public:
 
 private:
     QSharedPointer<TypeOfExpression> m_typeOfExpression;
-    unsigned m_completionOperator;
+    unsigned m_completionOperator = T_EOF_SYMBOL;
     mutable QChar m_typedChar;
-    bool m_isOverloaded;
+    bool m_isOverloaded = false;
 };
 
 } // Internal
diff --git a/src/plugins/cpptools/indexitem.h b/src/plugins/cpptools/indexitem.h
index edfa9a75fa6..4370bca4228 100644
--- a/src/plugins/cpptools/indexitem.h
+++ b/src/plugins/cpptools/indexitem.h
@@ -123,9 +123,9 @@ private:
     QString m_symbolScope;
     QString m_fileName;
     QIcon m_icon;
-    ItemType m_type;
-    int m_line;
-    int m_column;
+    ItemType m_type = All;
+    int m_line = 0;
+    int m_column = 0;
     QVector<IndexItem::Ptr> m_children;
 };
 
diff --git a/src/plugins/cpptools/insertionpointlocator.cpp b/src/plugins/cpptools/insertionpointlocator.cpp
index 41e074219bf..0fe27dbcc1d 100644
--- a/src/plugins/cpptools/insertionpointlocator.cpp
+++ b/src/plugins/cpptools/insertionpointlocator.cpp
@@ -354,7 +354,7 @@ public:
 class FindMethodDefinitionInsertPoint : protected ASTVisitor
 {
     QList<const Identifier *> _namespaceNames;
-    int _currentDepth;
+    int _currentDepth = 0;
     HighestValue<int, unsigned> _bestToken;
 
 public: