diff --git a/core/textdocumentgenerator.cpp b/core/textdocumentgenerator.cpp
index db21e0ba3..c362a7184 100644
--- a/core/textdocumentgenerator.cpp
+++ b/core/textdocumentgenerator.cpp
@@ -289,6 +289,9 @@ bool TextDocumentGenerator::doCloseDocument()
     d->mLinkPositions.clear();
     d->mLinkInfos.clear();
     d->mAnnotationInfos.clear();
+    // do not use clear() for the following two, otherwise they change type
+    d->mDocumentInfo = Okular::DocumentInfo();
+    d->mDocumentSynopsis = Okular::DocumentSynopsis();
 
     return true;
 }