diff --git a/extra/parser-combinators/regexp/regexp.factor b/extra/parser-combinators/regexp/regexp.factor
index b13321d991..7c23dcce0b 100755
--- a/extra/parser-combinators/regexp/regexp.factor
+++ b/extra/parser-combinators/regexp/regexp.factor
@@ -1,8 +1,9 @@
 USING: arrays combinators kernel lists math math.parser
-namespaces parser lexer parser-combinators parser-combinators.simple
-promises quotations sequences strings math.order
-assocs prettyprint.backend memoize unicode.case unicode.categories
-combinators.short-circuit accessors make io ;
+namespaces parser lexer parser-combinators
+parser-combinators.simple promises quotations sequences strings
+math.order assocs prettyprint.backend prettyprint.custom memoize
+unicode.case unicode.categories combinators.short-circuit
+accessors make io ;
 IN: parser-combinators.regexp
 
 <PRIVATE