diff --git a/impls/fennel/core.fnl b/impls/fennel/core.fnl
index a91968ec..c46b6786 100644
--- a/impls/fennel/core.fnl
+++ b/impls/fennel/core.fnl
@@ -670,7 +670,7 @@
   (t.make-fn
     (fn [asts]
         (t.make-number
-         (math.floor (* 1000 (os.clock)))))))
+         (math.floor (* 1000000 (os.clock)))))))
 
 (fn fennel-eval*
   [fennel-val]