diff --git a/part.cpp b/part.cpp
index 3838a0c68..763e373b2 100644
--- a/part.cpp
+++ b/part.cpp
@@ -412,7 +412,7 @@ void Part::slotDoFileDirty()
 
   if (KParts::ReadOnlyPart::openURL(m_file))
   {
-    if (m_viewportDirty.pageNumber > m_document->pages()) m_viewportDirty.pageNumber = m_document->pages();
+    if (m_viewportDirty.pageNumber >= (int)m_document->pages()) m_viewportDirty.pageNumber = (int)m_document->pages() - 1;
     m_document->setViewport(m_viewportDirty);
     m_viewportDirty.pageNumber = -1;
   }