diff --git a/src/google/adk/a2a/experimental.py b/src/google/adk/a2a/experimental.py
index 77c31fdeca..7f331eb763 100644
--- a/src/google/adk/a2a/experimental.py
+++ b/src/google/adk/a2a/experimental.py
@@ -23,7 +23,7 @@
     default_message=(
         "ADK Implementation for A2A support (A2aAgentExecutor, RemoteA2aAgent "
         "and corresponding supporting components etc.) is in experimental mode "
-        "and is subjected to breaking changes. A2A protocol and SDK are"
+        "and is subject to breaking changes. A2A protocol and SDK are "
         "themselves not experimental. Once it's stable enough the experimental "
         "mode will be removed. Your feedback is welcome."
     ),