typo fix

Makefile

@@ -50,7 +50,7 @@ install: all
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/dwm
 	@echo installing manual page to ${DESTDIR}${MANPREFIX}/man1
 	@mkdir -p ${DESTDIR}${MANPREFIX}/man1
-	@sed 's/VERSION/${VERSION}/g' < dwm.1 ${DESTDIR}${MANPREFIX}/man1/dwm.1
+	@sed 's/VERSION/${VERSION}/g' < dwm.1 > ${DESTDIR}${MANPREFIX}/man1/dwm.1
 	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/dwm.1
 
 uninstall: