diff --git a/glib/gtestutils.c b/glib/gtestutils.c
index 67baadab0..bb1bdd441 100644
--- a/glib/gtestutils.c
+++ b/glib/gtestutils.c
@@ -1128,7 +1128,7 @@ parse_args (gint    *argc_p,
  *   `quick`: Quick tests, should run really quickly and give good coverage.
  *
  *   `undefined`: Tests for undefined behaviour, may provoke programming errors
- *   under g_test_trap_subprocess() or g_test_expect_messages() to check
+ *   under g_test_trap_subprocess() or g_test_expect_message() to check
  *   that appropriate assertions or warnings are given
  *
  *   `no-undefined`: Avoid tests for undefined behaviour