diff --git a/spacy/tokenizer.pyx b/spacy/tokenizer.pyx
index f8df13610..4a148b356 100644
--- a/spacy/tokenizer.pyx
+++ b/spacy/tokenizer.pyx
@@ -45,10 +45,12 @@ cdef class Tokenizer:
             `re.compile(string).search` to match suffixes.
         `infix_finditer` (callable): A function matching the signature of
             `re.compile(string).finditer` to find infixes.
-        token_match (callable): A boolean function matching strings to be
+        token_match (callable): A function matching the signature of
+            `re.compile(string).match`, for matching strings to be
             recognized as tokens.
-        url_match (callable): A boolean function matching strings to be
-            recognized as tokens after considering prefixes and suffixes.
+        url_match (callable): A function matching the signature of
+            `re.compile(string).match`, for matching strings to be
+            recognized as urls.
 
         EXAMPLE:
             >>> tokenizer = Tokenizer(nlp.vocab)