diff --git a/phplanguagesupport.cpp b/phplanguagesupport.cpp
--- a/phplanguagesupport.cpp
+++ b/phplanguagesupport.cpp
@@ -84,6 +84,8 @@
     //By locking the parse-mutexes, we make sure that parse- and preprocess-jobs
     //get a chance to finish in a good state
     parseLock()->unlock();
+    delete m_highlighting;
+    delete m_refactoring;
 }
 
 KDevelop::ParseJob *LanguageSupport::createParseJob(const IndexedString &url)