diff --git a/c_glib/arrow-flight-glib/client.cpp b/c_glib/arrow-flight-glib/client.cpp
index 75b02ec25869f..596aa4b3a5a03 100644
--- a/c_glib/arrow-flight-glib/client.cpp
+++ b/c_glib/arrow-flight-glib/client.cpp
@@ -274,8 +274,8 @@ gaflight_call_options_clear_headers(GAFlightCallOptions *options)
 /**
  * gaflight_call_options_foreach_header:
  * @options: A #GAFlightCallOptions.
- * @func: (scope call): The user's callback function.
- * @user_data: (closure): Data for @func.
+ * @func: (scope call) (closure user_data): The user's callback function.
+ * @user_data: Data for @func.
  *
  * Iterates over all headers in the options.
  *
diff --git a/c_glib/arrow-flight-glib/server.cpp b/c_glib/arrow-flight-glib/server.cpp
index e39fd97b0d06c..2feeb853e2c51 100644
--- a/c_glib/arrow-flight-glib/server.cpp
+++ b/c_glib/arrow-flight-glib/server.cpp
@@ -461,8 +461,8 @@ gaflight_server_call_context_class_init(GAFlightServerCallContextClass *klass)
 /**
  * gaflight_server_call_context_foreach_incoming_header:
  * @context: A #GAFlightServerCallContext.
- * @func: (scope call): The user's callback function.
- * @user_data: (closure): Data for @func.
+ * @func: (scope call) (closure user_data): The user's callback function.
+ * @user_data: Data for @func.
  *
  * Iterates over all incoming headers.
  *