diff --git a/src/share/classes/sun/security/provider/certpath/AlgorithmChecker.java b/src/share/classes/sun/security/provider/certpath/AlgorithmChecker.java
index f7bedb99ccbf0702b1fd5f5d030de0977473f808..8282d51c42509e4418e4318392b317fa5d98db0a 100644
--- a/src/share/classes/sun/security/provider/certpath/AlgorithmChecker.java
+++ b/src/share/classes/sun/security/provider/certpath/AlgorithmChecker.java
@@ -270,7 +270,7 @@ public final class AlgorithmChecker extends PKIXCertPathChecker {
 
         AlgorithmParameters currSigAlgParams = algorithmId.getParameters();
         PublicKey currPubKey = cert.getPublicKey();
-        String currSigAlg = ((X509Certificate)cert).getSigAlgName();
+        String currSigAlg = x509Cert.getSigAlgName();
 
         // Check the signature algorithm and parameters against constraints.
         if (!constraints.permits(SIGNATURE_PRIMITIVE_SET, currSigAlg,