diff --git a/src/dos/Makefile.am b/src/dos/Makefile.am
index 8bc84fc8..ea8f9ad6 100644
--- a/src/dos/Makefile.am
+++ b/src/dos/Makefile.am
@@ -4,4 +4,4 @@ noinst_LIBRARIES = libdos.a
 libdos_a_SOURCES = dos.cpp dos_devices.cpp dos_execute.cpp dos_files.cpp dos_ioctl.cpp dos_memory.cpp \
                    dos_misc.cpp dos_classes.cpp dos_programs.cpp dos_tables.cpp \
 		   drives.cpp drives.h drive_virtual.cpp drive_local.cpp \
-		   dev_con.h drive_cache.cpp
+		   dev_con.h drive_cache.cpp cdrom.h cdrom.cpp cdrom_ioctl.cpp dos_mscdex.cpp