diff --git a/doc/org.eclipse.cdt.doc.user/images/indexer_preference_page.PNG b/doc/org.eclipse.cdt.doc.user/images/indexer_preference_page.png
similarity index 100%
rename from doc/org.eclipse.cdt.doc.user/images/indexer_preference_page.PNG
rename to doc/org.eclipse.cdt.doc.user/images/indexer_preference_page.png