diff --git a/src/plugins/autotoolsprojectmanager/autotoolsproject.cpp b/src/plugins/autotoolsprojectmanager/autotoolsproject.cpp
index ff4b78966cc..4019ef016fb 100644
--- a/src/plugins/autotoolsprojectmanager/autotoolsproject.cpp
+++ b/src/plugins/autotoolsprojectmanager/autotoolsproject.cpp
@@ -418,9 +418,10 @@ void AutotoolsProject::updateCppCodeModel()
     QByteArray macros;
 
     if (activeTarget()) {
-        ToolChain *tc = ProjectExplorer::ToolChainKitInformation::toolChain(activeTarget()->kit());
+        ProjectExplorer::Kit *k = activeTarget()->kit();
+        ToolChain *tc = ProjectExplorer::ToolChainKitInformation::toolChain(k);
         if (tc) {
-            const QList<HeaderPath> allHeaderPaths = tc->systemHeaderPaths();
+            const QList<HeaderPath> allHeaderPaths = tc->systemHeaderPaths(SysRootKitInformation::sysRoot(k));
             foreach (const HeaderPath &headerPath, allHeaderPaths) {
                 if (headerPath.kind() == HeaderPath::FrameworkHeaderPath)
                     allFrameworkPaths.append(headerPath.path());
diff --git a/src/plugins/cmakeprojectmanager/cmakeproject.cpp b/src/plugins/cmakeprojectmanager/cmakeproject.cpp
index 239e46594a7..b536af7c821 100644
--- a/src/plugins/cmakeprojectmanager/cmakeproject.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeproject.cpp
@@ -286,7 +286,8 @@ bool CMakeProject::parseCMakeLists()
 
     createUiCodeModelSupport();
 
-    ToolChain *tc = ProjectExplorer::ToolChainKitInformation::toolChain(activeTarget()->kit());
+    Kit *k = activeTarget()->kit();
+    ToolChain *tc = ProjectExplorer::ToolChainKitInformation::toolChain(k);
     if (!tc) {
         emit buildTargetsChanged();
         emit fileListChanged();
@@ -304,7 +305,7 @@ bool CMakeProject::parseCMakeLists()
 
     QStringList allFrameworkPaths;
     QList<ProjectExplorer::HeaderPath> allHeaderPaths;
-    allHeaderPaths = tc->systemHeaderPaths();
+    allHeaderPaths = tc->systemHeaderPaths(SysRootKitInformation::sysRoot(k));
     foreach (const ProjectExplorer::HeaderPath &headerPath, allHeaderPaths) {
         if (headerPath.kind() == ProjectExplorer::HeaderPath::FrameworkHeaderPath)
             allFrameworkPaths.append(headerPath.path());
diff --git a/src/plugins/genericprojectmanager/genericproject.cpp b/src/plugins/genericprojectmanager/genericproject.cpp
index fbf0bbb2fbf..db8991b8aba 100644
--- a/src/plugins/genericprojectmanager/genericproject.cpp
+++ b/src/plugins/genericprojectmanager/genericproject.cpp
@@ -249,13 +249,13 @@ void GenericProject::refresh(RefreshOptions options)
         CPlusPlus::CppModelManagerInterface::ProjectPart::Ptr part(
                     new CPlusPlus::CppModelManagerInterface::ProjectPart);
 
-        ToolChain *tc = activeTarget() ?
-                    ToolChainKitInformation::toolChain(activeTarget()->kit()) : 0;
+        Kit *k = activeTarget() ? activeTarget()->kit() : KitManager::instance()->defaultKit();
+        ToolChain *tc = k ? ToolChainKitInformation::toolChain(k) : 0;
         if (tc) {
             part->defines = tc->predefinedMacros(QStringList());
             part->defines += '\n';
 
-            foreach (const HeaderPath &headerPath, tc->systemHeaderPaths()) {
+            foreach (const HeaderPath &headerPath, tc->systemHeaderPaths(SysRootKitInformation::sysRoot(k))) {
                 if (headerPath.kind() == HeaderPath::FrameworkHeaderPath)
                     part->frameworkPaths.append(headerPath.path());
                 else
diff --git a/src/plugins/projectexplorer/abstractmsvctoolchain.cpp b/src/plugins/projectexplorer/abstractmsvctoolchain.cpp
index 0eea022e2a0..02d8b7f9e38 100644
--- a/src/plugins/projectexplorer/abstractmsvctoolchain.cpp
+++ b/src/plugins/projectexplorer/abstractmsvctoolchain.cpp
@@ -108,8 +108,9 @@ ToolChain::CompilerFlags AbstractMsvcToolChain::compilerFlags(const QStringList
     }
 }
 
-QList<HeaderPath> AbstractMsvcToolChain::systemHeaderPaths() const
+QList<HeaderPath> AbstractMsvcToolChain::systemHeaderPaths(const Utils::FileName &sysRoot) const
 {
+    Q_UNUSED(sysRoot);
     if (m_headerPaths.isEmpty()) {
         Utils::Environment env(m_lastEnvironment);
         addToEnvironment(env);
diff --git a/src/plugins/projectexplorer/abstractmsvctoolchain.h b/src/plugins/projectexplorer/abstractmsvctoolchain.h
index ef26aa401ce..f52bee76881 100644
--- a/src/plugins/projectexplorer/abstractmsvctoolchain.h
+++ b/src/plugins/projectexplorer/abstractmsvctoolchain.h
@@ -53,7 +53,7 @@ public:
 
     QByteArray predefinedMacros(const QStringList &cxxflags) const;
     CompilerFlags compilerFlags(const QStringList &cxxflags) const;
-    QList<HeaderPath> systemHeaderPaths() const;
+    QList<HeaderPath> systemHeaderPaths(const Utils::FileName &sysRoot) const;
     void addToEnvironment(Utils::Environment &env) const;
 
     QString makeCommand() const;
diff --git a/src/plugins/projectexplorer/gcctoolchain.cpp b/src/plugins/projectexplorer/gcctoolchain.cpp
index 61911262a4f..93eaf2f9af7 100644
--- a/src/plugins/projectexplorer/gcctoolchain.cpp
+++ b/src/plugins/projectexplorer/gcctoolchain.cpp
@@ -148,12 +148,12 @@ static QByteArray gccPredefinedMacros(const FileName &gcc, const QStringList &ar
     return predefinedMacros;
 }
 
-QList<HeaderPath> GccToolChain::gccHeaderPaths(const FileName &gcc, const QStringList &env, const QString &sysrootPath)
+QList<HeaderPath> GccToolChain::gccHeaderPaths(const FileName &gcc, const QStringList &env, const FileName &sysrootPath)
 {
     QList<HeaderPath> systemHeaderPaths;
     QStringList arguments;
     if (!sysrootPath.isEmpty())
-        arguments.append(QString::fromLatin1("--sysroot=%1").arg(sysrootPath));
+        arguments.append(QString::fromLatin1("--sysroot=%1").arg(sysrootPath.toString()));
     arguments << QLatin1String("-xc++")
               << QLatin1String("-E")
               << QLatin1String("-v")
@@ -393,13 +393,13 @@ ToolChain::CompilerFlags GccToolChain::compilerFlags(const QStringList &cxxflags
     return NO_FLAGS;
 }
 
-QList<HeaderPath> GccToolChain::systemHeaderPaths() const
+QList<HeaderPath> GccToolChain::systemHeaderPaths(const Utils::FileName &sysRoot) const
 {
     if (m_headerPaths.isEmpty()) {
         // Using a clean environment breaks ccache/distcc/etc.
         Environment env = Environment::systemEnvironment();
         addToEnvironment(env);
-        m_headerPaths = gccHeaderPaths(m_compilerCommand, env.toStringList());
+        m_headerPaths = gccHeaderPaths(m_compilerCommand, env.toStringList(), sysRoot);
     }
     return m_headerPaths;
 }
diff --git a/src/plugins/projectexplorer/gcctoolchain.h b/src/plugins/projectexplorer/gcctoolchain.h
index 45e32c8652d..37a99164792 100644
--- a/src/plugins/projectexplorer/gcctoolchain.h
+++ b/src/plugins/projectexplorer/gcctoolchain.h
@@ -64,7 +64,7 @@ public:
     QByteArray predefinedMacros(const QStringList &cxxflags) const;
     CompilerFlags compilerFlags(const QStringList &cxxflags) const;
 
-    QList<HeaderPath> systemHeaderPaths() const;
+    QList<HeaderPath> systemHeaderPaths(const Utils::FileName &sysRoot) const;
     void addToEnvironment(Utils::Environment &env) const;
     QString makeCommand() const;
     QList<Utils::FileName> suggestedMkspecList() const;
@@ -91,7 +91,7 @@ protected:
     virtual QList<Abi> detectSupportedAbis() const;
     virtual QString detectVersion() const;
 
-    static QList<HeaderPath> gccHeaderPaths(const Utils::FileName &gcc, const QStringList &env, const QString &sysrootPath = QString());
+    static QList<HeaderPath> gccHeaderPaths(const Utils::FileName &gcc, const QStringList &env, const Utils::FileName &sysrootPath);
 
     mutable QByteArray m_predefinedMacros;
 
diff --git a/src/plugins/projectexplorer/toolchain.h b/src/plugins/projectexplorer/toolchain.h
index 8c4bb703a5a..276bd0bc291 100644
--- a/src/plugins/projectexplorer/toolchain.h
+++ b/src/plugins/projectexplorer/toolchain.h
@@ -88,7 +88,7 @@ public:
         STD_CXX11 = 1
     };
     virtual CompilerFlags compilerFlags(const QStringList &cxxflags) const = 0;
-    virtual QList<HeaderPath> systemHeaderPaths() const = 0;
+    virtual QList<HeaderPath> systemHeaderPaths(const Utils::FileName &sysRoot) const = 0;
     virtual void addToEnvironment(Utils::Environment &env) const = 0;
     virtual QString makeCommand() const = 0;
 
diff --git a/src/plugins/qt4projectmanager/qt4project.cpp b/src/plugins/qt4projectmanager/qt4project.cpp
index c123adcdca2..f62bd9eff52 100644
--- a/src/plugins/qt4projectmanager/qt4project.cpp
+++ b/src/plugins/qt4projectmanager/qt4project.cpp
@@ -527,7 +527,7 @@ void Qt4Project::updateCppCodeModel()
 
         QList<HeaderPath> headers;
         if (tc)
-            headers = tc->systemHeaderPaths(); // todo pass cxxflags?
+            headers = tc->systemHeaderPaths(SysRootKitInformation::sysRoot(k)); // todo pass cxxflags?
         if (qtVersion) {
             headers.append(qtVersion->systemHeaderPathes(k));
         }