diff --git a/src/taoensso/encore/ctx_filter.cljc b/src/taoensso/encore/ctx_filter.cljc
index 1e2c2dcf..4cb66bad 100644
--- a/src/taoensso/encore/ctx_filter.cljc
+++ b/src/taoensso/encore/ctx_filter.cljc
@@ -156,8 +156,7 @@
     (valid-level x)))
 
 (defn update-level-spec
-  "TODO Docstring
-  ns, old, new may be nil"
+  "Returns valid updated level spec."
   ([old-spec         new-spec] (update-level-spec old-spec nil new-spec))
   ([old-spec nf-spec new-spec]
    (if (nil? nf-spec)