diff --git a/src/structs.h b/src/structs.h
index 0d3f60a..2218de7 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -3133,6 +3133,19 @@
     int		b_marks_read;	// Have we read viminfo marks yet?
 #endif
 
+    int		b_modified_was_set;	// did ":set modified"
+    int		b_did_filetype;		// FileType event found
+    int		b_keep_filetype;	// value for did_filetype when starting
+					// to execute autocommands
+
+    // Set by the apply_autocmds_group function if the given event is equal to
+    // EVENT_FILETYPE. Used by the readfile function in order to determine if
+    // EVENT_BUFREADPOST triggered the EVENT_FILETYPE.
+    //
+    // Relying on this value requires one to reset it prior calling
+    // apply_autocmds_group().
+    int		b_au_did_filetype;
+
     /*
      * The following only used in undo.c.
      */