diff --git a/core/play/src/main/scala/play/api/mvc/Request.scala b/core/play/src/main/scala/play/api/mvc/Request.scala
index 16aac385403..9881c9d87ae 100644
--- a/core/play/src/main/scala/play/api/mvc/Request.scala
+++ b/core/play/src/main/scala/play/api/mvc/Request.scala
@@ -96,7 +96,7 @@ trait Request[+A] extends RequestHeader {
   override def addAttrs(e1: TypedEntry[_], e2: TypedEntry[_], e3: TypedEntry[_]): Request[A] =
     withAttrs(attrs + (e1, e2, e3))
   override def addAttrs(entries: TypedEntry[_]*): Request[A] =
-    withAttrs(attrs + (entries: _*))
+    withAttrs(attrs.+(entries: _*))
   override def removeAttr(key: TypedKey[_]): Request[A] =
     withAttrs(attrs - key)
   override def withTransientLang(lang: Lang): Request[A] =
diff --git a/core/play/src/main/scala/play/api/mvc/RequestHeader.scala b/core/play/src/main/scala/play/api/mvc/RequestHeader.scala
index d1021e1d5d3..b0de617c2ea 100644
--- a/core/play/src/main/scala/play/api/mvc/RequestHeader.scala
+++ b/core/play/src/main/scala/play/api/mvc/RequestHeader.scala
@@ -186,7 +186,7 @@ trait RequestHeader {
    * @return The new version of this object with the new attributes.
    */
   def addAttrs(entries: TypedEntry[_]*): RequestHeader =
-    withAttrs(attrs + (entries: _*))
+    withAttrs(attrs.+(entries: _*))
 
   /**
    * Create a new versions of this object with the given attribute removed.
diff --git a/core/play/src/main/scala/play/api/mvc/Results.scala b/core/play/src/main/scala/play/api/mvc/Results.scala
index 7767ad5896c..c2fabd02aa6 100644
--- a/core/play/src/main/scala/play/api/mvc/Results.scala
+++ b/core/play/src/main/scala/play/api/mvc/Results.scala
@@ -429,7 +429,7 @@ case class Result(
    * @return The new version of this object with the new attributes.
    */
   def addAttrs(entries: TypedEntry[_]*): Result =
-    withAttrs(attrs + (entries: _*))
+    withAttrs(attrs.+(entries: _*))
 
   /**
    * Create a new versions of this object with the given attribute removed.