1 files changed, 1 insertions, 0 deletions
diff --git a/src/x11.h b/src/x11.h
index a048495..e90694a 100644
--- a/src/x11.h
+++ b/src/x11.h
@@ -84,6 +84,7 @@ struct PuglInternalsImpl {
   PuglX11Clipboard clipboard;
   int              screen;
   const char*      cursorName;
+  bool             mapped;
 };
 
 PUGL_WARN_UNUSED_RESULT