diff --git a/dom/crypto/WebCryptoTask.cpp b/dom/crypto/WebCryptoTask.cpp
index 34a4c877d7..e004ab6fc8 100644
--- a/dom/crypto/WebCryptoTask.cpp
+++ b/dom/crypto/WebCryptoTask.cpp
@@ -3574,6 +3574,7 @@ WebCryptoTask::CreateUnwrapKeyTask(nsIGlobalObject* aGlobal,
   if (keyAlgName.EqualsASCII(WEBCRYPTO_ALG_AES_CBC) ||
       keyAlgName.EqualsASCII(WEBCRYPTO_ALG_AES_CTR) ||
       keyAlgName.EqualsASCII(WEBCRYPTO_ALG_AES_GCM) ||
+      keyAlgName.EqualsASCII(WEBCRYPTO_ALG_AES_KW) ||
       keyAlgName.EqualsASCII(WEBCRYPTO_ALG_HKDF) ||
       keyAlgName.EqualsASCII(WEBCRYPTO_ALG_HMAC)) {
     importTask = new ImportSymmetricKeyTask(aGlobal, aCx, aFormat,