diff --git a/CHANGELOG.md b/CHANGELOG.md
index 279905d623..cc920994ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 # Unreleased
+- On X11, fix deadlock when calling `set_fullscreen_inner`.
 - On Web, prevent the webpage from scrolling when the user is focused on a winit canvas
 
 - On Wayland, fix deadlock when calling to `set_inner_size` from a callback.
diff --git a/src/platform_impl/linux/x11/window.rs b/src/platform_impl/linux/x11/window.rs
index f178ba3aa5..f4cb3d4536 100644
--- a/src/platform_impl/linux/x11/window.rs
+++ b/src/platform_impl/linux/x11/window.rs
@@ -640,6 +640,7 @@ impl UnownedWindow {
                 let flusher = self.set_fullscreen_hint(false);
                 let mut shared_state_lock = self.shared_state.lock();
                 if let Some(position) = shared_state_lock.restore_position.take() {
+                    drop(shared_state_lock);
                     self.set_position_inner(position.0, position.1).queue();
                 }
                 Some(flusher)