diff --git a/kitty/state.h b/kitty/state.h
index 93f54e44f..13729bf04 100644
--- a/kitty/state.h
+++ b/kitty/state.h
@@ -167,7 +167,7 @@ typedef struct {
     monotonic_t cursor_blink_zero_time, last_mouse_activity_at;
     double mouse_x, mouse_y;
     double logical_dpi_x, logical_dpi_y, font_sz_in_pts;
-    bool mouse_button_pressed[20];
+    bool mouse_button_pressed[32];
     PyObject *window_title;
     bool is_key_pressed[MAX_KEY_COUNT];
     bool viewport_size_dirty, viewport_updated_at_least_once;