diff --git a/japanese/canna-lib/Makefile b/japanese/canna-lib/Makefile
index 9d2281993efc..30c9f612fb57 100644
--- a/japanese/canna-lib/Makefile
+++ b/japanese/canna-lib/Makefile
@@ -18,5 +18,6 @@ USE_LDCONFIG=	yes
 ALL_TARGET=	canna
 INSTALL_TARGET=	instsgs
 MAKE_JOBS_UNSAFE=	yes
+MAKE_ARGS+=	CCOPTIONS="-Wno-error=int-conversion"
 
 .include <bsd.port.mk>