diff --git a/Modules/timemodule.c b/Modules/timemodule.c
index f631b05a647..ee3fb8db983 100644
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -83,8 +83,12 @@ time_time(self, args)
 #ifdef HAVE_CLOCK
 
 #ifndef CLOCKS_PER_SEC
+#ifdef CLK_TCK
+#define CLOCKS_PER_SEC CLK_TCK
+#else
 #define CLOCKS_PER_SEC 1000000
 #endif
+#endif
 
 static object *
 time_clock(self, args)