diff --git a/src/claude_agent_sdk/_errors.py b/src/claude_agent_sdk/_errors.py
index c86bf235..e3662dd5 100644
--- a/src/claude_agent_sdk/_errors.py
+++ b/src/claude_agent_sdk/_errors.py
@@ -17,6 +17,7 @@ class CLINotFoundError(CLIConnectionError):
     def __init__(
         self, message: str = "Claude Code not found", cli_path: str | None = None
     ):
+        self.cli_path = cli_path
         if cli_path:
             message = f"{message}: {cli_path}"
         super().__init__(message)
diff --git a/tests/test_errors.py b/tests/test_errors.py
index 9490d075..b8a854dd 100644
--- a/tests/test_errors.py
+++ b/tests/test_errors.py
@@ -23,6 +23,14 @@ def test_cli_not_found_error(self):
         error = CLINotFoundError("Claude Code not found")
         assert isinstance(error, ClaudeSDKError)
         assert "Claude Code not found" in str(error)
+        assert error.cli_path is None
+
+    def test_cli_not_found_error_with_path(self):
+        """Test CLINotFoundError stores cli_path and includes it in the message."""
+        error = CLINotFoundError("Claude Code not found", cli_path="/usr/bin/claude")
+        assert error.cli_path == "/usr/bin/claude"
+        assert "Claude Code not found" in str(error)
+        assert "/usr/bin/claude" in str(error)
 
     def test_connection_error(self):
         """Test CLIConnectionError."""