diff --git a/kpdf/kpdf_part.cpp b/kpdf/kpdf_part.cpp
index a45507381..6e9290d48 100644
--- a/kpdf/kpdf_part.cpp
+++ b/kpdf/kpdf_part.cpp
@@ -657,6 +657,9 @@ BrowserExtension::print()
 
 void Part::printPreview()
 {
+  if (m_doc == 0)
+    return;
+
   KPrinter printer;
   printer.setPreviewOnly( true );
   QPainter painter( &printer );