diff --git a/gtk/gtkimcontextwayland.c b/gtk/gtkimcontextwayland.c
index 2462f7201f..6c3b2b393a 100644
--- a/gtk/gtkimcontextwayland.c
+++ b/gtk/gtkimcontextwayland.c
@@ -323,7 +323,7 @@ notify_surrounding_text (GtkIMContextWayland *context)
           mid = MIN (context->surrounding.cursor_idx,
                      context->surrounding.anchor_idx) + (cursor_len / 2);
           a = MAX (0, mid - (MAX_LEN / 2));
-          b = MIN (MAX_LEN, mid + (MAX_LEN / 2));
+          b = MIN (len, mid + (MAX_LEN / 2));
 
           start = &context->surrounding.text[a];
           end = &context->surrounding.text[b];