diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index c5335aa83f4..6986d7ff5fb 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -1300,7 +1300,7 @@
         "category": "Error",
         "code": 2434
     },
-    "Ambient modules cannot be nested in other modules.": {
+    "Ambient modules cannot be nested in other modules or namespaces.": {
         "category": "Error",
         "code": 2435
     },