diff --git a/japanese/canna-server/Makefile b/japanese/canna-server/Makefile
index ebe78885f8c7..d6c4d1857ca5 100644
--- a/japanese/canna-server/Makefile
+++ b/japanese/canna-server/Makefile
@@ -23,6 +23,7 @@ USE_RC_SUBR=	canna
 INSTALL_TARGET=	instserver instclient
 PORTDOCS=	canna.bib canna.sty Imakefile README.jp Makefile \
 		intern lisp man
+MAKE_JOBS_UNSAFE=	yes
 
 post-install:
 	@cd ${INSTALL_WRKSRC} && ${SETENV} ${MAKE_ENV} ${MAKE} ${MAKE_FLAGS} \