diff --git a/src/tools/clangrefactoringbackend/source/symbolindexer.cpp b/src/tools/clangrefactoringbackend/source/symbolindexer.cpp
index 7f288ddc66a..b8d1f1e90c6 100644
--- a/src/tools/clangrefactoringbackend/source/symbolindexer.cpp
+++ b/src/tools/clangrefactoringbackend/source/symbolindexer.cpp
@@ -34,6 +34,7 @@ SymbolIndexer::SymbolIndexer(SymbolsCollectorInterface &symbolsCollector,
       m_symbolStorage(symbolStorage),
       m_pathWatcher(pathWatcher)
 {
+    pathWatcher.setNotifier(this);
 }
 
 void SymbolIndexer::updateProjectParts(V2::ProjectPartContainers &&projectParts,
@@ -52,4 +53,13 @@ void SymbolIndexer::updateProjectParts(V2::ProjectPartContainers &&projectParts,
                                                  m_symbolsCollector.sourceLocations());
 }
 
+void SymbolIndexer::pathsWithIdsChanged(const Utils::SmallStringVector &)
+{
+}
+
+void SymbolIndexer::pathsChanged(const FilePathIds &filePathIds)
+{
+
+}
+
 } // namespace ClangBackEnd
diff --git a/src/tools/clangrefactoringbackend/source/symbolindexer.h b/src/tools/clangrefactoringbackend/source/symbolindexer.h
index f9af79db5bd..239ffc9d5ee 100644
--- a/src/tools/clangrefactoringbackend/source/symbolindexer.h
+++ b/src/tools/clangrefactoringbackend/source/symbolindexer.h
@@ -34,7 +34,7 @@
 
 namespace ClangBackEnd {
 
-class SymbolIndexer
+class SymbolIndexer : public ClangPathWatcherNotifier
 {
 public:
     SymbolIndexer(SymbolsCollectorInterface &symbolsCollector,
@@ -44,6 +44,9 @@ public:
     void updateProjectParts(V2::ProjectPartContainers &&projectParts,
                             V2::FileContainers &&generatedFiles);
 
+    void pathsWithIdsChanged(const Utils::SmallStringVector &ids) override;
+    void pathsChanged(const FilePathIds &filePathIds) override;
+
 private:
     SymbolsCollectorInterface &m_symbolsCollector;
     SymbolStorageInterface &m_symbolStorage;
diff --git a/tests/unit/unittest/symbolindexer-test.cpp b/tests/unit/unittest/symbolindexer-test.cpp
index 09088ec637e..934733ba02e 100644
--- a/tests/unit/unittest/symbolindexer-test.cpp
+++ b/tests/unit/unittest/symbolindexer-test.cpp
@@ -167,5 +167,11 @@ TEST_F(SymbolIndexer, UpdateProjectPartsCallsInOrder)
     indexer.updateProjectParts({projectPart1}, Utils::clone(unsaved));
 }
 
+TEST_F(SymbolIndexer, CallSetNotifier)
+{
+    EXPECT_CALL(mockPathWatcher, setNotifier(_));
+
+    ClangBackEnd::SymbolIndexer indexer{mockCollector, mockStorage, mockPathWatcher};
+}
 
 }