diff --git a/src/Makefile.am b/src/Makefile.am
index 41eee666..7ca63a6f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -454,6 +454,7 @@ EXTRA_DIST = \
 	mod_skeleton.c \
 	configparser.y \
 	mod_ssi_exprparser.y \
+	lemon.c \
 	lempar.c \
 	SConscript \
 	CMakeLists.txt config.h.cmake