diff --git a/src/option.c b/src/option.c
index d680cfb..491a8d8 100644
--- a/src/option.c
+++ b/src/option.c
@@ -6410,6 +6410,9 @@
 	    }
 # endif
 	    curbuf->b_help = (curbuf->b_p_bt[0] == 'h');
+# ifdef FEAT_TITLE
+	    redraw_titles();
+# endif
 	}
     }
 #endif