diff --git a/src/plugins/cppeditor/cppfunctiondecldeflink.cpp b/src/plugins/cppeditor/cppfunctiondecldeflink.cpp
index d0494f8b0fe..537664023da 100644
--- a/src/plugins/cppeditor/cppfunctiondecldeflink.cpp
+++ b/src/plugins/cppeditor/cppfunctiondecldeflink.cpp
@@ -47,7 +47,7 @@
 #include <utils/runextensions.h>
 #include <utils/tooltip/tooltip.h>
 
-#include <QRegExp>
+#include <QRegularExpression>
 #include <QVarLengthArray>
 
 using namespace CPlusPlus;
@@ -359,7 +359,7 @@ static int declaredParameterCount(Function *function)
     return argc;
 }
 
-Q_GLOBAL_STATIC(QRegExp, commentArgNameRegexp)
+Q_GLOBAL_STATIC(QRegularExpression, commentArgNameRegexp)
 
 static bool hasCommentedName(
         TranslationUnit *unit,
@@ -410,9 +410,9 @@ static bool hasCommentedName(
 
     QString text = source.mid(nameStart, nameEnd - nameStart);
 
-    if (commentArgNameRegexp()->isEmpty())
-        *commentArgNameRegexp() = QRegExp(QLatin1String("/\\*\\s*(\\w*)\\s*\\*/"));
-    return commentArgNameRegexp()->indexIn(text) != -1;
+    if (commentArgNameRegexp()->pattern().isEmpty())
+        *commentArgNameRegexp() = QRegularExpression(QLatin1String("/\\*\\s*(\\w*)\\s*\\*/"));
+    return text.indexOf(*commentArgNameRegexp()) != -1;
 }
 
 static bool canReplaceSpecifier(TranslationUnit *translationUnit, SpecifierAST *specifier)
diff --git a/src/plugins/cpptools/cppmodelmanager.cpp b/src/plugins/cpptools/cppmodelmanager.cpp
index fe251aa1837..ce9fe475bb4 100644
--- a/src/plugins/cpptools/cppmodelmanager.cpp
+++ b/src/plugins/cpptools/cppmodelmanager.cpp
@@ -111,7 +111,7 @@ protected:
         pp(ast);
         QString code = QString::fromStdString(s.str());
         code.replace('\n', ' ');
-        code.replace(QRegExp("\\s+"), " ");
+        code.replace(QRegularExpression("\\s+"), " ");
 
         const char *name = abi::__cxa_demangle(typeid(*ast).name(), 0, 0, 0) + 11;