diff --git a/openid-connect-client/src/main/java/org/mitre/openid/connect/client/OIDCAuthenticationFilter.java b/openid-connect-client/src/main/java/org/mitre/openid/connect/client/OIDCAuthenticationFilter.java
index d2c4c46e4..1f6835d22 100644
--- a/openid-connect-client/src/main/java/org/mitre/openid/connect/client/OIDCAuthenticationFilter.java
+++ b/openid-connect-client/src/main/java/org/mitre/openid/connect/client/OIDCAuthenticationFilter.java
@@ -342,6 +342,10 @@ public class OIDCAuthenticationFilter extends AbstractAuthenticationProcessingFi
 
 					// needs to be wired in to the bean
 					signer = authenticationSignerService;
+					
+					if (alg == null) {
+						alg = authenticationSignerService.getDefaultSigningAlgorithm();
+					}
 				}
 
 				if (signer == null) {