diff --git a/anansi.cabal b/anansi.cabal
--- a/anansi.cabal
+++ b/anansi.cabal
@@ -1,5 +1,5 @@
 name: anansi
-version: 0.3.1
+version: 0.3.2
 synopsis: Simple literate programming preprocessor
 license: GPL-3
 license-file: license.txt
diff --git a/lib/Anansi/Tangle.hs b/lib/Anansi/Tangle.hs
--- a/lib/Anansi/Tangle.hs
+++ b/lib/Anansi/Tangle.hs
@@ -96,7 +96,7 @@
 putPosition enableLine pos = do
 	TangleState lastPos indent macros <- S.get
 	let expectedPos = Position (positionFile lastPos) (positionLine lastPos + 1)
-	let filename = FP.toText (positionFile pos)
+	let filename = either id id FP.toText (positionFile pos)
 	let line = if enableLine
 		then "\n#line " ++ show (positionLine pos) ++ " " ++ show filename ++ "\n"
 		else "\n"