diff --git a/src/engine/CMakeLists.txt b/src/engine/CMakeLists.txt
--- a/src/engine/CMakeLists.txt
+++ b/src/engine/CMakeLists.txt
@@ -10,6 +10,7 @@
     enginequery.cpp
     idtreedb.cpp
     idfilenamedb.cpp
+    indexerstate.cpp
     mtimedb.cpp
     orpostingiterator.cpp
     phraseanditerator.cpp
diff --git a/src/file/indexerstate.h b/src/engine/indexerstate.h
rename from src/file/indexerstate.h
rename to src/engine/indexerstate.h
--- a/src/file/indexerstate.h
+++ b/src/engine/indexerstate.h
@@ -22,10 +22,15 @@
 #ifndef BALOO_INDEXER_STATE_H
 #define BALOO_INDEXER_STATE_H
 
+#include <QObject>
 #include <QString>
 #include <KLocalizedString>
 
+#include "engine_export.h"
+
 namespace Baloo {
+Q_NAMESPACE_EXPORT(BALOO_ENGINE_EXPORT)
+
 enum IndexerState {
         Idle,
         Suspended,
@@ -38,50 +43,12 @@
         StaleIndexEntriesClean,
         LowPowerIdle,
 };
+Q_ENUM_NS(IndexerState)
 
-inline QString stateString(IndexerState state)
-{
-    QString status = i18n("Unknown");
-    switch (state) {
-    case Idle:
-        status = i18n("Idle");
-        break;
-    case Suspended:
-        status =  i18n("Suspended");
-        break;
-    case FirstRun:
-        status =  i18n("Initial Indexing");
-        break;
-    case NewFiles:
-        status = i18n("Indexing new files");
-        break;
-    case ModifiedFiles:
-        status = i18n("Indexing modified files");
-        break;
-    case XAttrFiles:
-        status = i18n("Indexing Extended Attributes");
-        break;
-    case ContentIndexing:
-        status = i18n("Indexing file content");
-        break;
-    case UnindexedFileCheck:
-        status = i18n("Checking for unindexed files");
-        break;
-    case StaleIndexEntriesClean:
-        status = i18n("Checking for stale index entries");
-        break;
-    case LowPowerIdle:
-        status = i18n("Idle (Powersave)");
-        break;
-    }
-    return status;
-}
+BALOO_ENGINE_EXPORT QString stateString(IndexerState state);
 
 //TODO: check for implicit conversion
-inline QString stateString(int state)
-{
-    return stateString(static_cast<IndexerState>(state));
-}
+BALOO_ENGINE_EXPORT QString stateString(int state);
 
 }
 #endif //BALOO_INDEXER_STATE_H
diff --git a/src/engine/indexerstate.cpp b/src/engine/indexerstate.cpp
new file mode 100644
--- /dev/null
+++ b/src/engine/indexerstate.cpp
@@ -0,0 +1,44 @@
+#include "indexerstate.h"
+
+QString Baloo::stateString(IndexerState state)
+{
+    QString status = i18n("Unknown");
+    switch (state) {
+    case Idle:
+        status = i18n("Idle");
+        break;
+    case Suspended:
+        status =  i18n("Suspended");
+        break;
+    case FirstRun:
+        status =  i18n("Initial Indexing");
+        break;
+    case NewFiles:
+        status = i18n("Indexing new files");
+        break;
+    case ModifiedFiles:
+        status = i18n("Indexing modified files");
+        break;
+    case XAttrFiles:
+        status = i18n("Indexing Extended Attributes");
+        break;
+    case ContentIndexing:
+        status = i18n("Indexing file content");
+        break;
+    case UnindexedFileCheck:
+        status = i18n("Checking for unindexed files");
+        break;
+    case StaleIndexEntriesClean:
+        status = i18n("Checking for stale index entries");
+        break;
+    case LowPowerIdle:
+        status = i18n("Idle (Powersave)");
+        break;
+    }
+    return status;
+}
+
+QString Baloo::stateString(int state)
+{
+    return stateString(static_cast<IndexerState>(state));
+}
diff --git a/src/qml/experimental/baloomonitorplugin.cpp b/src/qml/experimental/baloomonitorplugin.cpp
--- a/src/qml/experimental/baloomonitorplugin.cpp
+++ b/src/qml/experimental/baloomonitorplugin.cpp
@@ -19,13 +19,14 @@
 
 #include "baloomonitorplugin.h"
 #include "monitor.h"
+#include "indexerstate.h"
 
 #include <QtQml>
 
 void BalooMonitorPlugin::registerTypes(const char *uri)
 {
     Q_ASSERT(uri == QLatin1String("org.kde.baloo.experimental"));
 
     qmlRegisterType<Baloo::Monitor>(uri, 0, 1, "Monitor");
+    qmlRegisterUncreatableMetaObject(Baloo::staticMetaObject, uri, 0, 1, "Baloo", "Error: only enums");
 }
-
diff --git a/src/qml/experimental/monitor.h b/src/qml/experimental/monitor.h
--- a/src/qml/experimental/monitor.h
+++ b/src/qml/experimental/monitor.h
@@ -42,16 +42,16 @@
     Q_PROPERTY(uint filesIndexed MEMBER m_filesIndexed NOTIFY newFileIndexed)
     Q_PROPERTY(QString remainingTime READ remainingTime NOTIFY remainingTimeChanged)
     Q_PROPERTY(QString stateString READ stateString NOTIFY indexerStateChanged)
-    Q_PROPERTY(int state READ state NOTIFY indexerStateChanged)
+    Q_PROPERTY(Baloo::IndexerState state READ state NOTIFY indexerStateChanged)
 public:
     explicit Monitor(QObject* parent = nullptr);
 
     // Property readers
     QString filePath() const { return m_filePath; }
     QString suspendState() const;
     QString remainingTime() const { return m_remainingTime; }
     QString stateString() const { return Baloo::stateString(m_indexerState); }
-    int state() const { return static_cast<int>(m_indexerState); }
+    Baloo::IndexerState state() const { return m_indexerState; }
 
     // Invokable methods
     Q_INVOKABLE void toggleSuspendState();