diff --git a/hcar-ghc-mod.tex b/hcar-ghc-mod.tex
index 5ce7972..567b3c4 100644
--- a/hcar-ghc-mod.tex
+++ b/hcar-ghc-mod.tex
@@ -1,3 +1,4 @@
+% ghcmodHappyHaskellProgram-Kg.tex
 \begin{hcarentry}[updated]{ghc-mod --- Happy Haskell Programming}
 \report{Kazu Yamamoto}
 \status{open source, actively developed}