diff --git a/src/dos/Makefile.am b/src/dos/Makefile.am
index 7bd9b5af..3659aba3 100644
--- a/src/dos/Makefile.am
+++ b/src/dos/Makefile.am
@@ -4,6 +4,6 @@ noinst_LIBRARIES = libdos.a
 EXTRA_DIST = scsidefs.h wnaspi32.h
 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 drive_cache.cpp \
+		   drives.cpp drives.h drive_virtual.cpp drive_local.cpp drive_cache.cpp drive_fat.cpp \
 		   dev_con.h dos_mscdex.cpp \
 		   cdrom.h cdrom.cpp cdrom_ioctl_win32.cpp cdrom_aspi_win32.cpp cdrom_ioctl_linux.cpp