diff --git a/lib/inspector.js b/lib/inspector.js
index 60640bc1fb6456..007822ffa20f0d 100644
--- a/lib/inspector.js
+++ b/lib/inspector.js
@@ -3,7 +3,7 @@
 const {
   JSONParse,
   JSONStringify,
-  Map,
+  SafeMap,
   Symbol,
 } = primordials;
 
@@ -48,7 +48,7 @@ class Session extends EventEmitter {
     super();
     this[connectionSymbol] = null;
     this[nextIdSymbol] = 1;
-    this[messageCallbacksSymbol] = new Map();
+    this[messageCallbacksSymbol] = new SafeMap();
   }
 
   connect() {