diff --git a/doc/api/webcrypto.md b/doc/api/webcrypto.md
index a345655b77e703..fb27134a410b0d 100644
--- a/doc/api/webcrypto.md
+++ b/doc/api/webcrypto.md
@@ -1278,7 +1278,7 @@ added: v15.0.0
 added: v15.0.0
 -->
 
-* Type: {string} Must be `'HMAC`.
+* Type: {string} Must be `'HMAC'`.
 
 ### Class: `Pbkdf2ImportParams`
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