diff --git a/doc/api/crypto.markdown b/doc/api/crypto.markdown
index d6932f8e9dd5ee..2e3d36d81cb004 100644
--- a/doc/api/crypto.markdown
+++ b/doc/api/crypto.markdown
@@ -908,7 +908,7 @@ The `key` is the raw key used by the `algorithm` and `iv` is an
 [initialization vector][]. Both arguments must be `'binary'` encoded strings or
 [buffers][`Buffer`].
 
-## crypto.createDiffieHellman(prime[, prime_encoding][, generator][, generator_encoding])
+### crypto.createDiffieHellman(prime[, prime_encoding][, generator][, generator_encoding])
 
 Creates a `DiffieHellman` key exchange object using the supplied `prime` and an
 optional specific `generator`.