diff --git a/zsnes/src/makefile.dos b/zsnes/src/makefile.dos
index f7330563..3975f8d5 100644
--- a/zsnes/src/makefile.dos
+++ b/zsnes/src/makefile.dos
@@ -52,7 +52,7 @@ WINOBJ=${WINDIR}/copywin.o ${WINDIR}/winintrf.o ${WINDIR}/winlink.o\
 
 PREOBJ=${OBJDIR}/dosbuff.o ${OBJDIR}/ipx.o ${OBJDIR}/zipx.o
 
-ZIPOBJ=${ZIPDIR}/zzip.o ${ZIPDIR}/unzip.o ${ZIPDIR}/zpng.obj
+ZIPOBJ=${ZIPDIR}/zzip.o ${ZIPDIR}/unzip.o ${ZIPDIR}/zpng.o
 
 MAINOBJ=cfgload.o endmem.o fixsin.o init.o ui.o vcache.o water.o
 
@@ -89,7 +89,7 @@ water.o: water.c
 ${DOSDIR}/zfile.o: ${DOSDIR}/zfile.c
 ${ZIPDIR}/unzip.o: ${ZIPDIR}/unzip.c ${ZIPDIR}/unzip.h
 ${ZIPDIR}/zzip.o: ${ZIPDIR}/zzip.c ${ZIPDIR}/unzip.h
-${ZIPDIR}/zpng.obj: ${ZIPDIR}/zpng.c  ${ZIPDIR}/zpng.h ${ZIPDIR}/png.h
+${ZIPDIR}/zpng.o: ${ZIPDIR}/zpng.c  ${ZIPDIR}/zpng.h ${ZIPDIR}/png.h
 ${VIDEODIR}/procvid.o: ${VIDEODIR}/procvid.asm macros.mac ${VIDEODIR}/copyvid.inc ${VIDEODIR}/2xSaImmx.inc
 ${CHIPDIR}/dsp1proc.o: ${CHIPDIR}/dsp1proc.asm macros.mac
 ${CHIPDIR}/sa1regs.o: ${CHIPDIR}/sa1regs.asm macros.mac\