diff --git a/lib/libsys/Makefile.sys b/lib/libsys/Makefile.sys
--- a/lib/libsys/Makefile.sys
+++ b/lib/libsys/Makefile.sys
@@ -135,15 +135,17 @@
 FEATURE_NOTE=''
 .endif
 
-${SASM}:
-	printf '/* %sgenerated by libc/sys/Makefile.inc */\n' @ > ${.TARGET}
+__makefile_sys:=	${.PARSEDIR}/${.PARSEFILE}
+
+${SASM}: ${__makefile_sys}
+	printf '/* %sgenerated by libsys/Makefile.sys */\n' @ > ${.TARGET}
 	printf '#include "compat.h"\n' >> ${.TARGET}
 	printf '#include "SYS.h"\nRSYSCALL(${.PREFIX})\n' >> ${.TARGET}
 	printf  ${NOTE_GNU_STACK} >>${.TARGET}
 	printf  ${FEATURE_NOTE} >> ${.TARGET}
 
-${SPSEUDO}:
-	printf '/* %sgenerated by libc/sys/Makefile.inc */\n' @ > ${.TARGET}
+${SPSEUDO}: ${__makefile_sys}
+	printf '/* %sgenerated by libsys/Makefile.sys */\n' @ > ${.TARGET}
 	printf '#include "compat.h"\n' >> ${.TARGET}
 	printf '#include "SYS.h"\nPSEUDO(${.PREFIX:S/_//})\n' \
 	    >> ${.TARGET}