diff --git a/Makefile b/Makefile
index 0138951..0a0b4bb 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ build: noroot mkoutdir common.mk $(OUTPUTS)
 	find ! -regex '.*/\..*' -type d ! -perm 2775 -print0 | xargs -r0 chmod 2775 || true
 	find ! -regex '.*/\..*' -type d ! -group www -print0 | xargs -r0 chgrp www || true
 
-.PHONY += noroot
+.PHONY: noroot
 noroot:
 	if test $$UID = 0; then echo "don't build as root!"; exit 1; fi
 
diff --git a/about/Makefile b/about/Makefile
index e38a596..2b0eba4 100644
--- a/about/Makefile
+++ b/about/Makefile
@@ -6,6 +6,7 @@ include ../common.mk
 
 $(OUTDIR)members.html: $(OUTDIR)members.xml
 
+.PHONY: $(OUTDIR)members.xml
 $(OUTDIR)members.xml:
 	test -e /usr/bin/ceoquery || (echo 'Erorr: ceoquery not found'; exit 1)
 	echo '<?xml version='\''1.0'\''?>' > $@
diff --git a/common.mk.in b/common.mk.in
index 6af5f69..6c11ce4 100644
--- a/common.mk.in
+++ b/common.mk.in
@@ -8,14 +8,14 @@ else
 endif
 OUTPUTS = $(addprefix $(OUTDIR),$(FILES))
 
-.PHONY += mkoutdir
+.PHONY: mkoutdir
 mkoutdir:
 	mkdir -p $(OUTDIR)
 
-.PHONY += build
+.PHONY: build
 build: $(OUTPUTS)
 
-.PHONY += clean
+.PHONY: clean
 clean:
 ifeq "$(ROOT)" "/users/www/www"
 	rm -rf $(OUTDIR)/*