diff --git a/src/wayland/keyboard.rs b/src/wayland/keyboard.rs
index 52321b7..a3de4a5 100644
--- a/src/wayland/keyboard.rs
+++ b/src/wayland/keyboard.rs
@@ -154,6 +154,7 @@ impl Keyboard for VirtualKeyboard {
         self.keymap.write(b"xkb_keymap {\n").unwrap();
         self.keymap.write(b"  xkb_symbols \"ufkbd\" {\n").unwrap();
 
+        self.keycodes.clear();
         for row in layout.rows() {
             for key in row {
                 for part in &key.parts {
@@ -161,6 +162,10 @@ impl Keyboard for VirtualKeyboard {
                         continue;
                     }
 
+                    if self.keycodes.contains_key(&part.sym()) {
+                        continue;
+                    }
+
                     self.keycodes.insert(part.sym(), keycode - 8);
                     self.write_key(part, keycode);
                     keycode += 1;