diff --git a/src/plugins/projectexplorer/msvctoolchain.cpp b/src/plugins/projectexplorer/msvctoolchain.cpp
index 7638884aad6..5defb0b7449 100644
--- a/src/plugins/projectexplorer/msvctoolchain.cpp
+++ b/src/plugins/projectexplorer/msvctoolchain.cpp
@@ -1102,6 +1102,10 @@ void ClangClToolChain::resetMsvcToolChain(const MsvcToolChain *base)
     m_abi = base->targetAbi();
     m_vcvarsBat = base->varsBat();
     setVarsBatArg(base->varsBatArg());
+
+    initEnvModWatcher(Utils::runAsync(envModThreadPool(),
+                                      &ClangClToolChain::environmentModifications,
+                                      m_vcvarsBat, base->varsBatArg()));
 }
 
 bool ClangClToolChain::operator ==(const ToolChain &other) const
diff --git a/src/plugins/projectexplorer/msvctoolchain.h b/src/plugins/projectexplorer/msvctoolchain.h
index c1482b95b3a..73c683daf96 100644
--- a/src/plugins/projectexplorer/msvctoolchain.h
+++ b/src/plugins/projectexplorer/msvctoolchain.h
@@ -97,7 +97,6 @@ protected:
     LanguageVersion msvcLanguageVersion(const Core::Id &language,
                                         const Macros &macros) const override;
 
-private:
     struct GenerateEnvResult
     {
         Utils::optional<QString> error;
@@ -106,6 +105,8 @@ private:
     static void environmentModifications(QFutureInterface<GenerateEnvResult> &future,
                                          QString vcvarsBat, QString varsBatArg);
     void initEnvModWatcher(const QFuture<GenerateEnvResult> &future);
+
+private:
     void updateEnvironmentModifications(QList<Utils::EnvironmentItem> modifications);
 
     mutable QList<Utils::EnvironmentItem> m_environmentModifications;