1 files changed, 6 insertions, 0 deletions
diff --git a/src/library/scala/collection/convert/Wrappers.scala b/src/library/scala/collection/convert/Wrappers.scala
index 4410ddc7d8..6dab7c0e02 100644
--- a/src/library/scala/collection/convert/Wrappers.scala
+++ b/src/library/scala/collection/convert/Wrappers.scala
@@ -212,6 +212,12 @@ private[collection] trait Wrappers {
         }
       }
     }
+
+    override def containsKey(key: AnyRef): Boolean = try {
+      underlying.contains(key.asInstanceOf[A])
+    } catch {
+      case ex: ClassCastException => false
+    }
   }
 
   case class MutableMapWrapper[A, B](underlying: mutable.Map[A, B]) extends MapWrapper[A, B](underlying) {