diff --git a/webcrypto/elliptic_curve.go b/webcrypto/elliptic_curve.go
index b4e1e19..c9ccc80 100644
--- a/webcrypto/elliptic_curve.go
+++ b/webcrypto/elliptic_curve.go
@@ -409,18 +409,23 @@ func pickEllipticCurve(k string) (elliptic.Curve, error) {
 	}
 }
 
-func exportECKey(alg string, ck *CryptoKey, format KeyFormat) (interface{}, error) {
+func exportECKey(ck *CryptoKey, format KeyFormat) (interface{}, error) {
 	if ck.handle == nil {
 		return nil, NewError(OperationError, "key data is not accessible")
 	}
 
+	alg, ok := ck.Algorithm.(EcKeyAlgorithm)
+	if !ok {
+		return nil, NewError(InvalidAccessError, "key algorithm is not a valid EC algorithm")
+	}
+
 	switch format {
 	case RawKeyFormat:
 		if ck.Type != PublicCryptoKeyType {
 			return nil, NewError(InvalidAccessError, "key is not a valid elliptic curve public key")
 		}
 
-		bytes, err := extractPublicKeyBytes(alg, ck.handle)
+		bytes, err := extractPublicKeyBytes(alg.Name, ck.handle)
 		if err != nil {
 			return nil, NewError(OperationError, "unable to extract public key data: "+err.Error())
 		}
diff --git a/webcrypto/subtle_crypto.go b/webcrypto/subtle_crypto.go
index 49e90a4..20980ee 100644
--- a/webcrypto/subtle_crypto.go
+++ b/webcrypto/subtle_crypto.go
@@ -881,7 +881,7 @@ func (sc *SubtleCrypto) ExportKey(format KeyFormat, key goja.Value) *goja.Promis
 				return
 			}
 		case ECDH, ECDSA:
-			result, err = exportECKey(keyAlgorithmName, ck, format)
+			result, err = exportECKey(ck, format)
 			if err != nil {
 				reject(err)
 				return