diff --git a/doc/api/crypto.md b/doc/api/crypto.md
index 1c755864bfcd83..72d4bc78df9dde 100644
--- a/doc/api/crypto.md
+++ b/doc/api/crypto.md
@@ -1172,7 +1172,7 @@ encryption mechanism, PEM-level encryption is not supported when encrypting
 a PKCS#8 key. See [RFC 5208][] for PKCS#8 encryption and [RFC 1421][] for
 PKCS#1 and SEC1 encryption.
 
-### keyObject.symmetricSize
+### keyObject.symmetricKeySize
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