1 files changed, 1 insertions, 1 deletions
diff --git a/src/filetree.cpp b/src/filetree.cpp
index 7bc4d09c..cf20d4fd 100644
--- a/src/filetree.cpp
+++ b/src/filetree.cpp
@@ -261,7 +261,7 @@ void FileTree::activate(FileTreeItem* item)
 
   if (tryPreview) {
     const QFileInfo fi(item->realPath());
-    if (m_plugins.previewGenerator().previewSupported(fi.suffix())) {
+    if (m_plugins.previewGenerator().previewSupported(fi.suffix().toLower())) {
       preview(item);
       return;
     }