diff --git a/src/libs/qmljs/parser/qmljslexer.cpp b/src/libs/qmljs/parser/qmljslexer.cpp
index 9fe13dffefc..b8c594f593a 100644
--- a/src/libs/qmljs/parser/qmljslexer.cpp
+++ b/src/libs/qmljs/parser/qmljslexer.cpp
@@ -986,7 +986,7 @@ int Lexer::scanString(ScanStringMode mode)
                     _tokenText += QChar(QChar::highSurrogate(codePoint));
                     u = QChar::lowSurrogate(codePoint);
                 } else {
-                    u = codePoint;
+                    u = QChar(codePoint);
                 }
             } break;
 
diff --git a/src/plugins/bineditor/bineditorwidget.cpp b/src/plugins/bineditor/bineditorwidget.cpp
index 2c703512d19..f0fd2377927 100644
--- a/src/plugins/bineditor/bineditorwidget.cpp
+++ b/src/plugins/bineditor/bineditorwidget.cpp
@@ -61,6 +61,11 @@
 
 using namespace Core;
 
+namespace BinEditor {
+namespace Internal {
+
+const QChar MidpointChar = QLatin1Char(0xB7);
+
 static QByteArray calculateHexPattern(const QByteArray &pattern)
 {
     QByteArray result;
@@ -78,9 +83,6 @@ static QByteArray calculateHexPattern(const QByteArray &pattern)
     return result;
 }
 
-namespace BinEditor {
-namespace Internal {
-
 class BinEditorWidgetPrivate : public EditorService
 {
 public:
@@ -567,7 +569,7 @@ Utils::optional<qint64> BinEditorWidget::posAt(const QPoint &pos, bool includeEm
                 break;
             QChar qc(QLatin1Char(dataAt(dataPos)));
             if (!qc.isPrint())
-                qc = 0xB7;
+                qc = MidpointChar;
             x -= fontMetrics().horizontalAdvance(qc);
             if (x <= 0)
                 break;
@@ -863,7 +865,7 @@ void BinEditorWidget::paintEvent(QPaintEvent *e)
                     break;
                 QChar qc(QLatin1Char(dataAt(pos, isOld)));
                 if (qc.unicode() >= 127 || !qc.isPrint())
-                    qc = 0xB7;
+                    qc = MidpointChar;
                 printable += qc;
             }
         } else {
diff --git a/src/plugins/debugger/cdb/stringinputstream.h b/src/plugins/debugger/cdb/stringinputstream.h
index 2d4e22413f9..7ed82b38785 100644
--- a/src/plugins/debugger/cdb/stringinputstream.h
+++ b/src/plugins/debugger/cdb/stringinputstream.h
@@ -84,7 +84,7 @@ void StringInputStream::appendInt(IntType i)
         if (hexPrefix)
             pad -= 2;
         if (pad > 0)
-            m_target.append(QString('0', pad));
+            m_target.append(QString('0', QLatin1Char(pad)));
     }
     m_target.append(n);
 }
diff --git a/src/plugins/debugger/debuggerprotocol.cpp b/src/plugins/debugger/debuggerprotocol.cpp
index b62931705f7..30250f27d76 100644
--- a/src/plugins/debugger/debuggerprotocol.cpp
+++ b/src/plugins/debugger/debuggerprotocol.cpp
@@ -308,9 +308,9 @@ QString GdbMi::escapeCString(const QString &ba)
             default:
                 if (c < 32 || c == 127) {
                     ret += '\\';
-                    ret += ('0' + (c >> 6));
-                    ret += ('0' + ((c >> 3) & 7));
-                    ret += ('0' + (c & 7));
+                    ret += QLatin1Char('0' + (c >> 6));
+                    ret += QLatin1Char('0' + ((c >> 3) & 7));
+                    ret += QLatin1Char('0' + (c & 7));
                 } else {
                     ret += c;
                 }
@@ -521,7 +521,7 @@ static QString quoteUnprintableLatin1(const QString &ba)
     for (int i = 0, n = ba.size(); i != n; ++i) {
         const unsigned char c = ba.at(i).unicode();
         if (isprint(c)) {
-            res += c;
+            res += ba.at(i);
         } else {
             qsnprintf(buf, sizeof(buf) - 1, "\\%x", int(c));
             res += QLatin1String(buf);
diff --git a/src/plugins/fakevim/fakevimhandler.cpp b/src/plugins/fakevim/fakevimhandler.cpp
index b6df43d18a6..c46fbe4663e 100644
--- a/src/plugins/fakevim/fakevimhandler.cpp
+++ b/src/plugins/fakevim/fakevimhandler.cpp
@@ -1189,7 +1189,7 @@ public:
             return '\n';
         if (m_key == Key_Escape)
             return QChar(27);
-        return m_xkey;
+        return QChar(m_xkey);
     }
 
     QString toString() const