diff --git a/Makefile b/Makefile
index 716da18a..c73b560e 100644
--- a/Makefile
+++ b/Makefile
@@ -151,13 +151,13 @@ version.h: version~
 	@echo '#endif // VERSION_H' >> "$@"
 	@echo "Making FTL version on branch $(GIT_BRANCH) - $(GIT_VERSION) ($(GIT_DATE))"
 
-prefix=/usr
+PREFIX=/usr
 SETCAP = $(shell which setcap)
 
 # install target just installs the executable
 # other requirements (correct ownership of files, etc.) is managed by
 # the service script on sudo service pihole-FTL (re)start
 install: pihole-FTL
-	mkdir -p $(DESTDIR)$(prefix)/bin
-	install -m 0755 pihole-FTL $(DESTDIR)$(prefix)/bin
-	$(SETCAP) CAP_NET_BIND_SERVICE,CAP_NET_RAW,CAP_NET_ADMIN+eip $(DESTDIR)$(prefix)/bin/pihole-FTL
+	mkdir -p $(DESTDIR)$(PREFIX)/bin
+	install -m 0755 pihole-FTL $(DESTDIR)$(PREFIX)/bin
+	$(SETCAP) CAP_NET_BIND_SERVICE,CAP_NET_RAW,CAP_NET_ADMIN+eip $(DESTDIR)$(PREFIX)/bin/pihole-FTL