diff --git a/doc/api/crypto.markdown b/doc/api/crypto.markdown
index bc77020028a41d..e1852ff25252e0 100644
--- a/doc/api/crypto.markdown
+++ b/doc/api/crypto.markdown
@@ -135,7 +135,7 @@ Returned by `crypto.createHash`.
 
 Updates the hash content with the given `data`, the encoding of which
 is given in `input_encoding` and can be `'utf8'`, `'ascii'` or
-`'binary'`.  If no encoding is provided and the input is a string an
+`'binary'`.  If no encoding is provided, and the input is a string, an
 encoding of `'binary'` is enforced. If `data` is a `Buffer` then
 `input_encoding` is ignored.