diff --git a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/FilterDefinition.java b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/FilterDefinition.java
index 5923e871..e3545ddf 100644
--- a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/FilterDefinition.java
+++ b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/FilterDefinition.java
@@ -41,7 +41,7 @@ public class FilterDefinition {
 	}
 
 	public FilterDefinition(String text) {
-		int eqIdx = text.indexOf("=");
+		int eqIdx = text.indexOf('=');
 		if (eqIdx <= 0) {
 			setName(text);
 			return;
diff --git a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/PredicateDefinition.java b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/PredicateDefinition.java
index f202b9d4..f0798034 100644
--- a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/PredicateDefinition.java
+++ b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/handler/predicate/PredicateDefinition.java
@@ -42,7 +42,7 @@ public class PredicateDefinition {
 	}
 
 	public PredicateDefinition(String text) {
-		int eqIdx = text.indexOf("=");
+		int eqIdx = text.indexOf('=');
 		if (eqIdx <= 0) {
 			throw new ValidationException("Unable to parse PredicateDefinition text '" + text + "'" +
 					", must be of the form name=value");
diff --git a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/route/RouteDefinition.java b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/route/RouteDefinition.java
index c5ef5f47..f34c6b1a 100644
--- a/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/route/RouteDefinition.java
+++ b/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/route/RouteDefinition.java
@@ -56,7 +56,7 @@ public class RouteDefinition {
 	public RouteDefinition() {}
 
 	public RouteDefinition(String text) {
-		int eqIdx = text.indexOf("=");
+		int eqIdx = text.indexOf('=');
 		if (eqIdx <= 0) {
 			throw new ValidationException("Unable to parse RouteDefinition text '" + text + "'" +
 					", must be of the form name=value");