diff --git a/TravisCI.asciidoc b/TravisCI.asciidoc
index f977c64..3aad13a 100644
--- a/TravisCI.asciidoc
+++ b/TravisCI.asciidoc
@@ -4,6 +4,7 @@ Building your code on Travis CI is useful to check regressions against the maste
 
 [source,yaml]
 ----
+# Copied from https://github.com/nim-lang/Nim/wiki/TravisCI
 language: c
 env:
   # Build and test against the master and devel branches of Nim