diff --git a/lib/func_timer.py b/lib/func_timer.py
index ef837ef..1919c3e 100644
--- a/lib/func_timer.py
+++ b/lib/func_timer.py
@@ -201,7 +201,8 @@
             if self.__time_out is not None:
                 self.__time_out = int(self.__time_out)
                 # Ensure that time_out is non-negative.
-                message = gv.svalid_range(self.__time_out, [0], "time_out")
+                message = gv.valid_range(self.__time_out, 0,
+                                         var_name="time_out")
                 if message != "":
                     raise ValueError("\n"
                                      + gp.sprint_error_report(message,