diff --git a/zsnes/src/makefile.dos b/zsnes/src/makefile.dos
index 4b607513..17c1aee6 100644
--- a/zsnes/src/makefile.dos
+++ b/zsnes/src/makefile.dos
@@ -77,9 +77,6 @@ PP=gpp
 %.o: %.asm
 	${ASM} ${ASMFLAGS} -o $@ $<
 
-chips/dsp1emu.o: chips/dsp1emu.c
-	${CC} -O2 ${CFLAGS} -o $@ -c $<
-
 ALL: zsnes.exe
 
 zsnes.exe: ${OBJS}