diff --git a/Makefile b/Makefile
index b5346e14..7d6c4003 100644
--- a/Makefile
+++ b/Makefile
@@ -338,7 +338,7 @@ release : version $(BIN)
 
 # Create a zip archive ready for upload to the website, including binaries and sourcecode
 ziprelease: version $(BIN) release
-	echo `sed "s/.*=\"\\\(.*\\\)\";/\1/" pversion.c`.`svnversion` | tr " :" "_-" | sed -e s/\\\(wip\\\)\\\\./\\1/I > $(OBJDIR)/versiontag
+	echo `sed "s/.*=\"\\\(.*\\\)\";/\1/" pversion.c`.`svnversion` | tr " :" "_-" | sed -e "s/\\\(wip\\\)\\\\./\\1/I" > $(OBJDIR)/versiontag
 
 	tar cvzf "src-`cat $(OBJDIR)/versiontag`.tgz" --transform 's,^,src/,g' *.c *.h Makefile Makefile.dep gfx2.ico 
 	$(ZIP) $(ZIPOPT) "grafx2-`cat $(OBJDIR)/versiontag`$(TTFLABEL)-$(PLATFORM).$(ZIP)" $(BIN) gfx2def.ini scripts/test.lua $(SKIN_FILES) gfx2.gif doc/README.txt doc/COMPILING.txt doc/gpl-2.0.txt fonts/8pxfont.png doc/README-zlib1.txt doc/README-SDL.txt doc/README-SDL_image.txt doc/README-SDL_ttf.txt doc/README-lua.txt fonts/Tuffy.ttf src-`cat $(OBJDIR)/versiontag`.tgz $(PLATFORMFILES)