1 files changed, 1 insertions, 0 deletions
diff --git a/parser.moon b/parser.moon
index d8bd834..c179b03 100644
--- a/parser.moon
+++ b/parser.moon
@@ -112,6 +112,7 @@ NOMSU_PATTERN = do
     re.compile(nomsu_peg, NOMSU_DEFS)
 
 Parser.parse = (nomsu_code, source=nil)->
+    source or= nomsu_code.source
     nomsu_code = tostring(nomsu_code)
     userdata = {
         indent: "", errors: {}, :source