diff --git a/src/modules/backlight.cpp b/src/modules/backlight.cpp
index 58d14dde..a595073e 100644
--- a/src/modules/backlight.cpp
+++ b/src/modules/backlight.cpp
@@ -191,7 +191,7 @@ auto waybar::modules::Backlight::update() -> void {
       const uint8_t percent =
           best->get_max() == 0 ? 100 : round(best->get_actual() * 100.0f / best->get_max());
       std::string desc =
-          fmt::format(fmt::runtime(format_), fmt::arg("percent", std::to_string(percent)),
+          fmt::format(fmt::runtime(format_), fmt::arg("percent", percent),
                       fmt::arg("icon", getIcon(percent)));
       label_.set_markup(desc);
       getState(percent);
@@ -202,7 +202,7 @@ auto waybar::modules::Backlight::update() -> void {
         }
         if (!tooltip_format.empty()) {
           label_.set_tooltip_text(fmt::format(fmt::runtime(tooltip_format),
-                                              fmt::arg("percent", std::to_string(percent)),
+                                              fmt::arg("percent", percent),
                                               fmt::arg("icon", getIcon(percent))));
         } else {
           label_.set_tooltip_text(desc);