diff --git a/joy/library.py b/joy/library.py
index e6920af..76eee4b 100644
--- a/joy/library.py
+++ b/joy/library.py
@@ -1069,7 +1069,7 @@ def genrec(stack, expression, dictionary):
 def map_(S, expression, dictionary):
   '''
   Run the quoted program on TOS on the items in the list under it, push a
-  new list with the results (in place of the program and original list.
+  new list with the results in place of the program and original list.
   '''
 #  (quote, (aggregate, stack)) = S
 #  results = list_to_stack([
diff --git a/thun/defs.txt b/thun/defs.txt
index ab0ad81..e883053 100644
--- a/thun/defs.txt
+++ b/thun/defs.txt
@@ -1,6 +1,6 @@
 -- == 1 -
 ++ == 1 +
-?  == dup bool
+? == dup bool
 anamorphism == [pop []] swap [dip swons] genrec
 app1 == grba infrst
 app2 == [grba swap grba swap] dip [infrst] cons ii