diff --git a/src/tools/clangrefactoringbackend/source/symbolindexer.cpp b/src/tools/clangrefactoringbackend/source/symbolindexer.cpp
index 0f5c57af0c3..02aa98dea0e 100644
--- a/src/tools/clangrefactoringbackend/source/symbolindexer.cpp
+++ b/src/tools/clangrefactoringbackend/source/symbolindexer.cpp
@@ -68,6 +68,8 @@ void SymbolIndexer::updateProjectPart(V2::ProjectPartContainer &&projectPart,
     m_symbolStorage.updateProjectPartSources(projectPart.projectPartId(),
                                              m_symbolsCollector.sourceFiles());
 
+        m_symbolStorage.insertOrUpdateUsedDefines(m_symbolsCollector.usedDefines());
+
     transaction.commit();
 
 }
diff --git a/src/tools/clangrefactoringbackend/source/symbolstorage.h b/src/tools/clangrefactoringbackend/source/symbolstorage.h
index bbdf11a9222..54183619dcf 100644
--- a/src/tools/clangrefactoringbackend/source/symbolstorage.h
+++ b/src/tools/clangrefactoringbackend/source/symbolstorage.h
@@ -81,6 +81,11 @@ public:
         }
     }
 
+    void insertOrUpdateUsedDefines(const UsedDefines &usedDefines) override
+    {
+
+    }
+
     void updateProjectPartSources(Utils::SmallStringView projectPartName,
                                   const FilePathIds &sourceFilePathIds) override
     {
diff --git a/src/tools/clangrefactoringbackend/source/symbolstorageinterface.h b/src/tools/clangrefactoringbackend/source/symbolstorageinterface.h
index 8f05c512f7c..7c58d2fbde7 100644
--- a/src/tools/clangrefactoringbackend/source/symbolstorageinterface.h
+++ b/src/tools/clangrefactoringbackend/source/symbolstorageinterface.h
@@ -28,6 +28,7 @@
 #include "projectpartentry.h"
 #include "sourcelocationentry.h"
 #include "symbolentry.h"
+#include "useddefines.h"
 
 #include <sqlitetransaction.h>
 
@@ -47,6 +48,7 @@ public:
                                            const Utils::SmallStringVector &commandLineArguments) = 0;
     virtual void updateProjectPartSources(Utils::SmallStringView projectPartName,
                                           const FilePathIds &sourceFilePathIds) = 0;
+    virtual void insertOrUpdateUsedDefines(const UsedDefines &usedDefines) = 0;
 };
 
 } // namespace ClangBackEnd
diff --git a/tests/unit/unittest/mocksymbolstorage.h b/tests/unit/unittest/mocksymbolstorage.h
index 36cdf49381d..2c147b9eac2 100644
--- a/tests/unit/unittest/mocksymbolstorage.h
+++ b/tests/unit/unittest/mocksymbolstorage.h
@@ -43,4 +43,6 @@ public:
    MOCK_METHOD2(updateProjectPartSources,
                 void(Utils::SmallStringView projectPartName,
                      const ClangBackEnd::FilePathIds &sourceFilePathIds));
+   MOCK_METHOD1(insertOrUpdateUsedDefines,
+                void (const ClangBackEnd::UsedDefines &usedDefines));
 };
diff --git a/tests/unit/unittest/symbolindexer-test.cpp b/tests/unit/unittest/symbolindexer-test.cpp
index 1e0d239094e..a58bf0f4704 100644
--- a/tests/unit/unittest/symbolindexer-test.cpp
+++ b/tests/unit/unittest/symbolindexer-test.cpp
@@ -47,6 +47,7 @@ using ClangBackEnd::SymbolEntry;
 using ClangBackEnd::SourceLocationEntries;
 using ClangBackEnd::SourceLocationEntry;
 using ClangBackEnd::SymbolType;
+using ClangBackEnd::UsedDefines;
 
 MATCHER_P2(IsFileId, directoryId, fileNameId,
           std::string(negation ? "isn't " : "is ")
@@ -63,6 +64,7 @@ protected:
         ON_CALL(mockCollector, symbols()).WillByDefault(ReturnRef(symbolEntries));
         ON_CALL(mockCollector, sourceLocations()).WillByDefault(ReturnRef(sourceLocations));
         ON_CALL(mockCollector, sourceFiles()).WillByDefault(ReturnRef(sourceFileIds));
+        ON_CALL(mockCollector, usedDefines()).WillByDefault(ReturnRef(usedDefines));
     }
 
 protected:
@@ -86,6 +88,7 @@ protected:
     SymbolEntries symbolEntries{{1, {"function", "function"}}};
     SourceLocationEntries sourceLocations{{1, {1, 1}, {42, 23}, SymbolType::Declaration}};
     FilePathIds sourceFileIds{{1, 1}, {42, 23}};
+    UsedDefines usedDefines{{"Foo", {1, 1}}};
     NiceMock<MockSqliteTransactionBackend> mockSqliteTransactionBackend;
     NiceMock<MockSymbolsCollector> mockCollector;
     NiceMock<MockSymbolStorage> mockStorage;
@@ -176,6 +179,14 @@ TEST_F(SymbolIndexer, UpdateProjectPartsCallsUpdateProjectPartSources)
     indexer.updateProjectParts({projectPart1, projectPart2}, Utils::clone(unsaved));
 }
 
+TEST_F(SymbolIndexer, UpdateProjectPartsCallsInsertOrUpdateUsedDefines)
+{
+    EXPECT_CALL(mockStorage, insertOrUpdateUsedDefines(Eq(usedDefines)))
+            .Times(2);
+
+    indexer.updateProjectParts({projectPart1, projectPart2}, Utils::clone(unsaved));
+}
+
 TEST_F(SymbolIndexer, UpdateProjectPartsCallsInOrder)
 {
     InSequence s;
@@ -188,6 +199,7 @@ TEST_F(SymbolIndexer, UpdateProjectPartsCallsInOrder)
     EXPECT_CALL(mockStorage, addSymbolsAndSourceLocations(symbolEntries, sourceLocations));
     EXPECT_CALL(mockStorage, insertOrUpdateProjectPart(_, _));
     EXPECT_CALL(mockStorage, updateProjectPartSources(_, _));
+    EXPECT_CALL(mockStorage, insertOrUpdateUsedDefines(Eq(usedDefines)));
     EXPECT_CALL(mockSqliteTransactionBackend, commit());
 
     indexer.updateProjectParts({projectPart1}, Utils::clone(unsaved));