diff --git a/Makefile.am b/Makefile.am
index b6c93d5..9237233 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -35,7 +35,7 @@
 endif
 
 libturbojpeg_la_SOURCES = $(libjpeg_la_SOURCES) turbojpegl.c turbojpeg.h \
-	transupp.c transupp.h
+	transupp.c transupp.h jdatadst-tj.c jdatasrc-tj.c
 
 SUBDIRS = java