diff --git a/services/src/main/java/org/keycloak/protocol/oidc/endpoints/AuthorizationEndpoint.java b/services/src/main/java/org/keycloak/protocol/oidc/endpoints/AuthorizationEndpoint.java
index c9b4079744..c1e847a937 100755
--- a/services/src/main/java/org/keycloak/protocol/oidc/endpoints/AuthorizationEndpoint.java
+++ b/services/src/main/java/org/keycloak/protocol/oidc/endpoints/AuthorizationEndpoint.java
@@ -239,7 +239,6 @@ public class AuthorizationEndpoint extends AuthorizationEndpointBase {
                 action = Action.CODE;
             }
         } catch (IllegalArgumentException iae) {
-            logger.error(iae.getMessage());
             event.error(Errors.INVALID_REQUEST);
             return redirectErrorToClient(OIDCResponseMode.QUERY, OAuthErrorException.UNSUPPORTED_RESPONSE_TYPE, null);
         }
diff --git a/services/src/main/java/org/keycloak/protocol/oidc/utils/OIDCResponseType.java b/services/src/main/java/org/keycloak/protocol/oidc/utils/OIDCResponseType.java
index e423dc9443..585a357713 100644
--- a/services/src/main/java/org/keycloak/protocol/oidc/utils/OIDCResponseType.java
+++ b/services/src/main/java/org/keycloak/protocol/oidc/utils/OIDCResponseType.java
@@ -54,7 +54,7 @@ public class OIDCResponseType {
             if (ALLOWED_RESPONSE_TYPES.contains(current)) {
                 allowedTypes.add(current);
             } else {
-                throw new IllegalArgumentException("Unsupported response_type: " + responseTypeParam);
+                throw new IllegalArgumentException("Unsupported response_type");
             }
         }