diff --git a/src/globals.h b/src/globals.h
index 0281103..a17430d 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -386,6 +386,11 @@
 /* When deleting the current buffer, another one must be loaded.  If we know
  * which one is preferred, au_new_curbuf is set to it */
 EXTERN buf_T	*au_new_curbuf INIT(= NULL);
+
+/* When deleting the buffer and autocmd_busy is TRUE, do not free the buffer
+ * but link it in the list starting with au_pending_free_buf, using b_next.
+ * Free the buffer when autocmd_busy is set to FALSE. */
+EXTERN buf_T	*au_pending_free_buf INIT(= NULL);
 #endif
 
 #ifdef FEAT_MOUSE