diff --git a/codecompletion/completionworker.cpp b/codecompletion/completionworker.cpp
index d8ee52b..2c61175 100644
--- a/codecompletion/completionworker.cpp
+++ b/codecompletion/completionworker.cpp
@@ -1,42 +1,42 @@
 /*
  * Copyright 2017  Emma Gospodinova <emma.gospodinova@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "completionworker.h"
 #include "completionmodel.h"
 #include "completioncontext.h"
 
 namespace Rust
 {
 
 CompletionWorker::CompletionWorker(CompletionModel *parent)
     : KDevelop::CodeCompletionWorker(parent)
 {
 }
 
-KDevelop::CodeCompletionContext *CompletionWorker::createCompletionContext(KDevelop::DUContextPointer context,
+KDevelop::CodeCompletionContext *CompletionWorker::createCompletionContext(const KDevelop::DUContextPointer &context,
                                                                            const QString &contextText,
                                                                            const QString &followingText,
                                                                            const KDevelop::CursorInRevision &position) const
 {
     if (!context) {
         return nullptr;
     }
 
     return new CompletionContext(context, contextText, followingText, position, 0);
 }
 
 }
diff --git a/codecompletion/completionworker.h b/codecompletion/completionworker.h
index a0306c7..3851f70 100644
--- a/codecompletion/completionworker.h
+++ b/codecompletion/completionworker.h
@@ -1,43 +1,43 @@
 /*
  * Copyright 2017  Emma Gospodinova <emma.gospodinova@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef COMPLETIONWORKER_H
 #define COMPLETIONWORKER_H
 
 #include <language/codecompletion/codecompletionworker.h>
 
 namespace Rust
 {
 
 class CompletionModel;
 
 class CompletionWorker : public KDevelop::CodeCompletionWorker
 {
     Q_OBJECT
 public:
     CompletionWorker(CompletionModel *parent);
 
 protected:
-    KDevelop::CodeCompletionContext *createCompletionContext(KDevelop::DUContextPointer context,
+    KDevelop::CodeCompletionContext *createCompletionContext(const KDevelop::DUContextPointer &context,
                                                              const QString &contextText,
                                                              const QString &followingText,
                                                              const KDevelop::CursorInRevision &position) const override;
 };
 
 }
 
 #endif // COMPLETIONWORKER_H