diff --git a/Source/Time.m b/Source/Time.m
index 4d5c93163..d20761cb9 100644
--- a/Source/Time.m
+++ b/Source/Time.m
@@ -107,7 +107,7 @@ id monthNames;
  
   /* CLK_TCK is the number of clock ticks each second */ 
 #ifndef CLK_TCK
-#define CLK_TCK sysconf(3) /* sysconf(_SC_CLK_TCK) */
+#define CLK_TCK sysconf(_SC_CLK_TCK) /* sysconf(3) */
 #endif
   return ((long)((end_tms.tms_utime - start_tms.tms_utime + 
                 end_tms.tms_stime - start_tms.tms_stime) * 1000) / CLK_TCK);