diff --git a/src/main/java/net/openhft/chronicle/map/MapClosable.java b/src/main/java/net/openhft/chronicle/map/MapClosable.java
new file mode 100644
index 000000000..dfc5dc9c0
--- /dev/null
+++ b/src/main/java/net/openhft/chronicle/map/MapClosable.java
@@ -0,0 +1,11 @@
+package net.openhft.chronicle.map;
+
+import net.openhft.chronicle.core.io.Closeable;
+
+public interface MapClosable extends Closeable {
+
+    @Override
+    default boolean isClosed() {
+        throw new UnsupportedOperationException();
+    }
+}