diff --git a/src/app_layout.cpp b/src/app_layout.cpp
index bd817ef..438e77c 100644
--- a/src/app_layout.cpp
+++ b/src/app_layout.cpp
@@ -15,7 +15,7 @@ void App::title_update()
     if (auto docname = layout[main_id]->find<NodeText>("txt-docname"))
         docname->set_text(str);
     if (auto node = layout[main_id]->find<NodeText>("txt-dpi"))
-        node->set_text(fmt::format("{}x-dpi", zoom).c_str());
+        node->set_text(fmt::format("{:.1f}x-dpi", zoom).c_str());
 }
 
 void App::init_toolbar_main()