diff --git a/libsrc/atari/Makefile b/libsrc/atari/Makefile
index eecda6c6d..4833aee05 100644
--- a/libsrc/atari/Makefile
+++ b/libsrc/atari/Makefile
@@ -23,7 +23,7 @@ S_OBJS = crt0.o kbhit.o conio.o clrscr.o cputc.o ctype.o chline.o cvline.o \
 	 gotox.o gotoy.o savevec.o rwcommon.o cgetc.o read.o getargs.o close.o \
 	 open.o oserror.o fdtable.o setcolor.o scroll.o mul40.o graphuse.o \
 	 ostype.o clock.o lseek.o dioread.o diowrite.o siocall.o diowritev.o \
-	 dio_cts.o dio_stc.o diopncls.o getfd.o
+	 dio_cts.o dio_stc.o diopncls.o getfd.o mouse.o
 
 all:	$(C_OBJS) $(S_OBJS)