diff --git a/gnu/lib/csu/Makefile b/gnu/lib/csu/Makefile
index 431baac607c5..0e50152afd5d 100644
--- a/gnu/lib/csu/Makefile
+++ b/gnu/lib/csu/Makefile
@@ -71,7 +71,7 @@ crtendS.o:	${ENDSRC}
 		-c -o ${.TARGET} ${.ALLSRC:N*.h}
 
 CLEANFILES+=	tm.h tconfig.h options.h optionlist cs-tconfig.h cs-tm.h
-tm.h tconfig.h options.h: ${CCDIR}/cc_tools/Makefile
+tm.h tconfig.h options.h: ${CCDIR}/cc_tools/Makefile .PHONY
 	(cd ${.CURDIR}; ${MAKE} -f ${.ALLSRC} MFILE=${.ALLSRC} GCCDIR=${GCCDIR} ${.TARGET})
 
 .include <bsd.lib.mk>
diff --git a/gnu/lib/libgcc/Makefile b/gnu/lib/libgcc/Makefile
index f824bbc6112c..04c3a55c63aa 100644
--- a/gnu/lib/libgcc/Makefile
+++ b/gnu/lib/libgcc/Makefile
@@ -343,7 +343,7 @@ ${_src:R:S/$/.So/}: ${_src} ${COMMONHDRS}
 #
 # Generated headers
 #
-${COMMONHDRS}: ${.CURDIR}/../../usr.bin/cc/cc_tools/Makefile
+${COMMONHDRS}: ${.CURDIR}/../../usr.bin/cc/cc_tools/Makefile .PHONY
 	(cd ${.CURDIR}; ${MAKE} -f ${.ALLSRC} MFILE=${.ALLSRC} GCCDIR=${GCCDIR} ${.TARGET})
 
 CLEANFILES += ${COMMONHDRS}
diff --git a/gnu/lib/libgcov/Makefile b/gnu/lib/libgcov/Makefile
index 7582720f53b7..34932aac2ed1 100644
--- a/gnu/lib/libgcov/Makefile
+++ b/gnu/lib/libgcov/Makefile
@@ -45,7 +45,7 @@ CC_S =	${CC} -c ${CFLAGS} ${PICFLAG} -DSHARED
 COMMONHDRS=	tm.h tconfig.h gcov-iov.h options.h
 CLEANFILES+=	${COMMONHDRS} cs-tm.h cs-tconfig.h options.h optionlist
 
-${COMMONHDRS}: ${.CURDIR}/../../usr.bin/cc/cc_tools/Makefile
+${COMMONHDRS}: ${.CURDIR}/../../usr.bin/cc/cc_tools/Makefile .PHONY
 	(cd ${.CURDIR}; ${MAKE} -f ${.ALLSRC} MFILE=${.ALLSRC} GCCDIR=${GCCDIR} ${.TARGET})
 
 ${OBJS} beforedepend: ${COMMONHDRS}