diff --git a/.travis.yml b/.travis.yml
index 5ecfb0f1..46e6b510 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: elixir
 elixir:
   - 1.8.2
   - 1.9.4
+  - 1.10.2
 otp_release:
   - 22.2
   - 21.3
diff --git a/lib/new_relic/tracer/macro.ex b/lib/new_relic/tracer/macro.ex
index 6f5f8a83..d9265b4c 100644
--- a/lib/new_relic/tracer/macro.ex
+++ b/lib/new_relic/tracer/macro.ex
@@ -17,6 +17,7 @@ defmodule NewRelic.Tracer.Macro do
 
   # Take no action on the definition of a function head
   def __on_definition__(_env, _access, _name, _args, _guards, nil), do: nil
+  def __on_definition__(_env, _access, _name, _args, _guards, []), do: nil
 
   # Take no action if there is a top-level rescue clause
   def __on_definition__(env, _access, name, _args, _guards, do: _, rescue: _) do