diff --git a/src/window.rs b/src/window.rs
index ebfbb2316..d8e8eed5e 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -347,6 +347,7 @@ impl WindowBuilder {
     ///
     /// - **Wayland:** This control only CSD. You can also use `WINIT_WAYLAND_CSD_THEME` env variable to set the theme.
     ///   Possible values for env variable are: "dark" and light".
+    /// - **x11:** Build window with `_GTK_THEME_VARIANT` hint set to `dark` or `light`.
     /// - **iOS / Android / Web / x11:** Ignored.
     #[inline]
     pub fn with_theme(mut self, theme: Option<Theme>) -> Self {
@@ -949,7 +950,7 @@ impl Window {
     ///
     /// - **Wayland:** You can also use `WINIT_WAYLAND_CSD_THEME` env variable to set the theme.
     /// Possible values for env variable are: "dark" and light". When unspecified, a theme is automatically selected.
-    ///
+    /// -**x11:** Sets `_GTK_THEME_VARIANT` hint to `dark` or `light`.
     /// - **iOS / Android / Web / x11:** Unsupported.
     #[inline]
     pub fn set_theme(&self, theme: Theme) {