diff --git a/src/plugins/cpptools/cpptoolseditorsupport.cpp b/src/plugins/cpptools/cpptoolseditorsupport.cpp
index f9e37b51901..08377b2fabd 100644
--- a/src/plugins/cpptools/cpptoolseditorsupport.cpp
+++ b/src/plugins/cpptools/cpptoolseditorsupport.cpp
@@ -118,7 +118,7 @@ CppEditorSupport::CppEditorSupport(CppModelManager *modelManager, BaseTextEditor
     connect(m_modelManager, SIGNAL(documentUpdated(CPlusPlus::Document::Ptr)),
             this, SLOT(onDocumentUpdated(CPlusPlus::Document::Ptr)));
 
-    if (m_highlightingSupport->requiresSemanticInfo()) {
+    if (m_highlightingSupport && m_highlightingSupport->requiresSemanticInfo()) {
         connect(this, SIGNAL(semanticInfoUpdated(CppTools::SemanticInfo)),
                 this, SLOT(startHighlighting()));
     }
@@ -191,7 +191,7 @@ void CppEditorSupport::recalculateSemanticInfoDetached(bool force)
     m_futureSemanticInfo = QtConcurrent::run<CppEditorSupport, void>(
                 &CppEditorSupport::recalculateSemanticInfoDetached_helper, this, source);
 
-    if (force && !m_highlightingSupport->requiresSemanticInfo())
+    if (force && m_highlightingSupport && !m_highlightingSupport->requiresSemanticInfo())
         startHighlighting();
 }
 
@@ -212,7 +212,7 @@ void CppEditorSupport::updateDocumentNow()
     } else {
         m_updateDocumentTimer->stop();
 
-        if (!m_highlightingSupport->requiresSemanticInfo()) {
+        if (m_highlightingSupport && !m_highlightingSupport->requiresSemanticInfo()) {
             startHighlighting();
         }