diff --git a/CHANGELOG.md b/CHANGELOG.md
index 026e2bec..a30f35e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,7 @@ And please only add new entries to the top of this list, right below the `# Unre
 - On Windows, emit `ReceivedCharacter` events on system keybindings.
 - On Windows, fixed focus event emission on minimize.
 - On X11, fixed IME crashing during reload.
+- On Wayland, fix byte offset in `Ime::Preedit` pointing to invalid bytes.
 
 # 0.27.3
 
diff --git a/src/platform_impl/linux/wayland/seat/text_input/handlers.rs b/src/platform_impl/linux/wayland/seat/text_input/handlers.rs
index 8d12b8f4..ed2540cb 100644
--- a/src/platform_impl/linux/wayland/seat/text_input/handlers.rs
+++ b/src/platform_impl/linux/wayland/seat/text_input/handlers.rs
@@ -68,9 +68,14 @@ pub(super) fn handle_text_input(
             cursor_begin,
             cursor_end,
         } => {
-            let cursor_begin = usize::try_from(cursor_begin).ok();
-            let cursor_end = usize::try_from(cursor_end).ok();
             let text = text.unwrap_or_default();
+            let cursor_begin = usize::try_from(cursor_begin)
+                .ok()
+                .and_then(|idx| text.is_char_boundary(idx).then(|| idx));
+            let cursor_end = usize::try_from(cursor_end)
+                .ok()
+                .and_then(|idx| text.is_char_boundary(idx).then(|| idx));
+
             inner.pending_preedit = Some(Preedit {
                 text,
                 cursor_begin,