diff --git a/src/plugins/qmldesigner/designercore/projectstorage/projectstorageupdater.cpp b/src/plugins/qmldesigner/designercore/projectstorage/projectstorageupdater.cpp
index 761d6371efe..d8d0c6ef525 100644
--- a/src/plugins/qmldesigner/designercore/projectstorage/projectstorageupdater.cpp
+++ b/src/plugins/qmldesigner/designercore/projectstorage/projectstorageupdater.cpp
@@ -191,6 +191,11 @@ void addModuleExportedImport(Storage::Synchronization::ModuleExportedImports &im
     imports.emplace_back(moduleId, exportedModuleId, version, isAutoVersion);
 }
 
+bool isOptionalImport(QmlDirParser::Import::Flags flags)
+{
+    return flags & QmlDirParser::Import::Optional && !(flags & QmlDirParser::Import::OptionalDefault);
+}
+
 void addModuleExportedImports(Storage::Synchronization::ModuleExportedImports &imports,
                               ModuleId moduleId,
                               ModuleId cppModuleId,
@@ -205,6 +210,9 @@ void addModuleExportedImports(Storage::Synchronization::ModuleExportedImports &i
                                keyValue("module id", moduleId)};
 
     for (const QmlDirParser::Import &qmldirImport : qmldirImports) {
+        if (isOptionalImport(qmldirImport.flags))
+            continue;
+
         Utils::PathString exportedModuleName{qmldirImport.module};
         ModuleId exportedModuleId = projectStorage.moduleId(exportedModuleName);
         addModuleExportedImport(imports,
diff --git a/tests/unit/tests/unittests/projectstorage/projectstorageupdater-test.cpp b/tests/unit/tests/unittests/projectstorage/projectstorageupdater-test.cpp
index 96909857b32..0d8b5cfc34e 100644
--- a/tests/unit/tests/unittests/projectstorage/projectstorageupdater-test.cpp
+++ b/tests/unit/tests/unittests/projectstorage/projectstorageupdater-test.cpp
@@ -1541,12 +1541,12 @@ TEST_F(ProjectStorageUpdater, synchronize_qmldir_imports_with_double_entries)
     updater.update(directories, {}, {}, {});
 }
 
-TEST_F(ProjectStorageUpdater, synchronize_qmldir_optional_imports)
+TEST_F(ProjectStorageUpdater, synchronize_qmldir_default_imports)
 {
     QString qmldir{R"(module Example
                       import Qml auto
                       import QML 2.1
-                      optional import Quick
+                      default import Quick
                       )"};
     setContent(u"/path/qmldir", qmldir);
 
@@ -1583,6 +1583,40 @@ TEST_F(ProjectStorageUpdater, synchronize_qmldir_optional_imports)
     updater.update(directories, {}, {}, {});
 }
 
+TEST_F(ProjectStorageUpdater, do_not_synchronize_qmldir_optional_imports)
+{
+    QString qmldir{R"(module Example
+                      import Qml auto
+                      import QML 2.1
+                      optional import Quick
+                      )"};
+    setContent(u"/path/qmldir", qmldir);
+
+    EXPECT_CALL(projectStorageMock,
+                synchronize(
+                    AllOf(Field(&SynchronizationPackage::moduleExportedImports,
+                                UnorderedElementsAre(ModuleExportedImport{exampleModuleId,
+                                                                          qmlModuleId,
+                                                                          Storage::Version{},
+                                                                          IsAutoVersion::Yes},
+                                                     ModuleExportedImport{exampleCppNativeModuleId,
+                                                                          qmlCppNativeModuleId,
+                                                                          Storage::Version{},
+                                                                          IsAutoVersion::No},
+                                                     ModuleExportedImport{exampleModuleId,
+                                                                          builtinModuleId,
+                                                                          Storage::Version{2, 1},
+                                                                          IsAutoVersion::No},
+                                                     ModuleExportedImport{exampleCppNativeModuleId,
+                                                                          builtinCppNativeModuleId,
+                                                                          Storage::Version{},
+                                                                          IsAutoVersion::No})),
+                          Field(&SynchronizationPackage::updatedModuleIds,
+                                ElementsAre(exampleModuleId)))));
+
+    updater.update(directories, {}, {}, {});
+}
+
 TEST_F(ProjectStorageUpdater, update_path_watcher_directories)
 {
     EXPECT_CALL(patchWatcherMock,