1 files changed, 1 insertions, 0 deletions
diff --git a/lisplib.c b/lisplib.c
index 73b739ee..a6f4d931 100644
--- a/lisplib.c
+++ b/lisplib.c
@@ -56,6 +56,7 @@ static void set_place_dlt_entries(val dlt, val fun)
     lit("set"), lit("pset"), lit("zap"), lit("flip"), lit("inc"), lit("dec"),
     lit("push"), lit("pop"), lit("swap"), lit("shift"), lit("rotate"),
     lit("del"),
+    lit("define-modify-macro"),
     nil
   };