1 files changed, 4 insertions, 2 deletions
diff --git a/src/api/window.c b/src/api/window.c
index b178b8ecf1..8fca1b1797 100644
--- a/src/api/window.c
+++ b/src/api/window.c
@@ -172,11 +172,13 @@ Position window_get_position(Window window, Error *err)
 
 Tabpage window_get_tabpage(Window window, Error *err)
 {
-  abort();
+  set_api_error("Not implemented", err);
+  return 0;
 }
 
 bool window_is_valid(Window window)
 {
-  abort();
+  Error stub = {.set = false};
+  return find_window(window, &stub) != NULL;
 }