diff --git a/src/core/window-private.h b/src/core/window-private.h
index b05087b44..049d9d864 100644
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -653,5 +653,6 @@ void meta_window_propagate_focus_appearance (MetaWindow *window,
                                              gboolean    focused);
 
 gboolean meta_window_should_attach_to_parent (MetaWindow *window);
+gboolean meta_window_can_tile_side_by_side   (MetaWindow *window);
 
 #endif
diff --git a/src/core/window.c b/src/core/window.c
index 6f1efc8b6..58e097cac 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -3603,7 +3603,7 @@ meta_window_can_tile_maximized (MetaWindow *window)
   return window->has_maximize_func;
 }
 
-static gboolean
+gboolean
 meta_window_can_tile_side_by_side (MetaWindow *window)
 {
   const MetaMonitorInfo *monitor;