diff --git a/src/plugins/android/androiddebugsupport.cpp b/src/plugins/android/androiddebugsupport.cpp
index be3858ab8c9..df02874bcde 100644
--- a/src/plugins/android/androiddebugsupport.cpp
+++ b/src/plugins/android/androiddebugsupport.cpp
@@ -171,7 +171,7 @@ void AndroidDebugSupport::start()
     DebuggerRunParameters &rp = runParameters();
     rp.setAttachPid(m_runner->pid());
     if (rp.isCppDebugging()) {
-        if (cppEngineType() == LldbEngineType) {
+        if (rp.cppEngineType() == LldbEngineType) {
             QString deviceSerialNumber = Internal::deviceSerialNumber(runControl()->target());
             const int colonPos = deviceSerialNumber.indexOf(QLatin1Char(':'));
             if (colonPos > 0) {
diff --git a/src/plugins/debugger/debuggerengine.cpp b/src/plugins/debugger/debuggerengine.cpp
index 8a870604435..a448ed05777 100644
--- a/src/plugins/debugger/debuggerengine.cpp
+++ b/src/plugins/debugger/debuggerengine.cpp
@@ -139,7 +139,7 @@ DebuggerRunParameters DebuggerRunParameters::fromRunControl(ProjectExplorer::Run
     params.setSysRoot(SysRootKitAspect::sysRoot(kit));
     params.macroExpander = runControl->macroExpander();
     params.debugger = DebuggerKitAspect::runnable(kit);
-    params.cppEngineType = DebuggerKitAspect::engineType(kit);
+    params.m_cppEngineType = DebuggerKitAspect::engineType(kit);
     params.version = DebuggerKitAspect::version(kit);
 
     if (QtSupport::QtVersion *qtVersion = QtSupport::QtKitAspect::qtVersion(kit))
@@ -147,7 +147,7 @@ DebuggerRunParameters DebuggerRunParameters::fromRunControl(ProjectExplorer::Run
 
     if (auto aspect = runControl->aspectData<DebuggerRunConfigurationAspect>()) {
         if (!aspect->useCppDebugger)
-            params.cppEngineType = NoEngineType;
+            params.m_cppEngineType = NoEngineType;
         params.m_isQmlDebugging = aspect->useQmlDebugger;
         params.isPythonDebugging = aspect->usePythonDebugger;
         params.multiProcess = aspect->useMultiProcess;
@@ -309,7 +309,7 @@ void DebuggerRunParameters::setStartMode(DebuggerStartMode startMode)
     if (startMode != AttachToQmlServer)
         return;
 
-    cppEngineType = NoEngineType;
+    m_cppEngineType = NoEngineType;
     m_isQmlDebugging = true;
     m_closeMode = KillAtClose;
 
@@ -336,12 +336,7 @@ void DebuggerRunParameters::addSolibSearchDir(const QString &str)
 
 bool DebuggerRunParameters::isCppDebugging() const
 {
-    return cppEngineType == GdbEngineType
-           || cppEngineType == LldbEngineType
-           || cppEngineType == CdbEngineType
-           || cppEngineType == GdbDapEngineType
-           || cppEngineType == LldbDapEngineType
-           || cppEngineType == UvscEngineType;
+    return cppEngineType() != NoEngineType;
 }
 
 bool DebuggerRunParameters::isNativeMixedDebugging() const
@@ -3019,9 +3014,9 @@ void CppDebuggerEngine::validateRunParameters(DebuggerRunParameters &rp)
         if (CheckableDecider(warnOnInappropriateDebuggerKey).shouldAskAgain()) {
             QString preferredDebugger;
             if (rp.toolChainAbi.osFlavor() == Abi::WindowsMSysFlavor) {
-                if (rp.cppEngineType == CdbEngineType)
+                if (rp.cppEngineType() == CdbEngineType)
                     preferredDebugger = "GDB";
-            } else if (rp.cppEngineType != CdbEngineType && rp.cppEngineType != LldbEngineType) {
+            } else if (rp.cppEngineType() != CdbEngineType && rp.cppEngineType() != LldbEngineType) {
                 // osFlavor() is MSVC, so the recommended debugger is still CDB,
                 // but don't warn for LLDB which starts to be usable, too.
                 preferredDebugger = "CDB";
@@ -3037,7 +3032,7 @@ void CppDebuggerEngine::validateRunParameters(DebuggerRunParameters &rp)
             }
         }
         if (warnOnRelease
-                && rp.cppEngineType == CdbEngineType
+                && rp.cppEngineType() == CdbEngineType
                 && rp.startMode() != AttachToRemoteServer) {
             QTC_ASSERT(!rp.symbolFile().isEmpty(), return);
             if (!rp.symbolFile().exists() && !rp.symbolFile().endsWith(".exe"))
@@ -3057,7 +3052,7 @@ void CppDebuggerEngine::validateRunParameters(DebuggerRunParameters &rp)
     }
     case Abi::ElfFormat: {
         if (CheckableDecider(warnOnInappropriateDebuggerKey).shouldAskAgain()) {
-            if (rp.cppEngineType == CdbEngineType) {
+            if (rp.cppEngineType() == CdbEngineType) {
                 warnOnInappropriateDebugger = true;
                 detailedWarning = Tr::tr(
                     "The inferior is in the ELF format.\n"
diff --git a/src/plugins/debugger/debuggerengine.h b/src/plugins/debugger/debuggerengine.h
index 771d2acdd1c..dee11b935fe 100644
--- a/src/plugins/debugger/debuggerengine.h
+++ b/src/plugins/debugger/debuggerengine.h
@@ -178,7 +178,8 @@ public:
 
     QString additionalStartupCommands() const { return m_additionalStartupCommands; }
 
-    DebuggerEngineType cppEngineType = NoEngineType;
+    DebuggerEngineType cppEngineType() const { return m_cppEngineType; }
+
     QString version;
 
     bool isPythonDebugging = false;
@@ -281,6 +282,8 @@ private:
 
     // Macro-expanded and passed to debugger startup.
     QString m_additionalStartupCommands;
+
+    DebuggerEngineType m_cppEngineType = NoEngineType;
 };
 
 namespace Internal {
diff --git a/src/plugins/debugger/debuggerruncontrol.cpp b/src/plugins/debugger/debuggerruncontrol.cpp
index bf5df1b6cb7..0a71a608530 100644
--- a/src/plugins/debugger/debuggerruncontrol.cpp
+++ b/src/plugins/debugger/debuggerruncontrol.cpp
@@ -221,7 +221,7 @@ void DebuggerRunTool::startTerminalIfNeededAndContinueStartup()
         m_runParameters.useTerminal = false;
 
     // CDB has a built-in console that might be preferred by some.
-    const bool useCdbConsole = m_runParameters.cppEngineType == CdbEngineType
+    const bool useCdbConsole = m_runParameters.cppEngineType() == CdbEngineType
             && (m_runParameters.startMode() == StartInternal
                 || m_runParameters.startMode() == StartExternal)
             && settings().useCdbConsole();
@@ -310,7 +310,7 @@ void DebuggerRunTool::continueAfterTerminalStart()
         return;
     }
 
-    if (m_runParameters.cppEngineType == CdbEngineType
+    if (m_runParameters.cppEngineType() == CdbEngineType
         && Utils::is64BitWindowsBinary(m_runParameters.inferior().command.executable())
             && !Utils::is64BitWindowsBinary(m_runParameters.debugger.command.executable())) {
         reportFailure(
@@ -338,7 +338,7 @@ void DebuggerRunTool::continueAfterDebugServerStart()
 
     if (m_engines.isEmpty()) {
         if (m_runParameters.isCppDebugging()) {
-            switch (m_runParameters.cppEngineType) {
+            switch (m_runParameters.cppEngineType()) {
             case GdbEngineType:
                 m_engines << createGdbEngine();
                 break;
@@ -557,11 +557,6 @@ void DebuggerRunTool::setupPortsGatherer()
         runControl()->requestQmlChannel();
 }
 
-DebuggerEngineType DebuggerRunTool::cppEngineType() const
-{
-    return m_runParameters.cppEngineType;
-}
-
 DebuggerRunTool::DebuggerRunTool(RunControl *runControl, AllowTerminal allowTerminal)
     : RunWorker(runControl)
     , d(new DebuggerRunToolPrivate)
diff --git a/src/plugins/debugger/debuggerruncontrol.h b/src/plugins/debugger/debuggerruncontrol.h
index d1283bbb661..28b21ced1e2 100644
--- a/src/plugins/debugger/debuggerruncontrol.h
+++ b/src/plugins/debugger/debuggerruncontrol.h
@@ -52,8 +52,6 @@ public:
 
     void setAbi(const ProjectExplorer::Abi &abi);
 
-    DebuggerEngineType cppEngineType() const;
-
     DebuggerRunParameters &runParameters() { return m_runParameters; }
 
 private: