diff --git a/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/DedupeResponseHeaderGatewayFilterFactory.java b/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/DedupeResponseHeaderGatewayFilterFactory.java
index dd159d31..b3b3b75b 100644
--- a/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/DedupeResponseHeaderGatewayFilterFactory.java
+++ b/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/DedupeResponseHeaderGatewayFilterFactory.java
@@ -73,7 +73,7 @@ Modified response header Access-Control-Allow-Credentials: true
 public class DedupeResponseHeaderGatewayFilterFactory
 		extends AbstractGatewayFilterFactory<DedupeResponseHeaderGatewayFilterFactory.Config> {
 
-	private static final String STRATEGY_KEY = "strategy";
+	public static final String STRATEGY_KEY = "strategy";
 
 	public DedupeResponseHeaderGatewayFilterFactory() {
 		super(Config.class);