diff --git a/cpp/src/arrow/filesystem/azurefs.h b/cpp/src/arrow/filesystem/azurefs.h
index 97b5108c9f058..99f06e3421f6d 100644
--- a/cpp/src/arrow/filesystem/azurefs.h
+++ b/cpp/src/arrow/filesystem/azurefs.h
@@ -106,7 +106,7 @@ struct ARROW_EXPORT AzureOptions {
   Status ConfigureDefaultCredential(const std::string& account_name);
 
   Status ConfigureManagedIdentityCredential(const std::string& account_name,
-                                            std::string const& clientId = std::string());
+                                            const std::string& client_id = std::string());
 
   Status ConfigureWorkloadIdentityCredential(const std::string& account_name);