diff --git a/security/botan110/Makefile b/security/botan110/Makefile
index e0337452b2b6..aa5a07ae3711 100644
--- a/security/botan110/Makefile
+++ b/security/botan110/Makefile
@@ -15,6 +15,8 @@ COMMENT=	Portable, easy to use, and efficient C++ crypto library
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/doc/license.txt
 
+BROKEN_riscv64=		fails to build: Unknown or unidentifiable processor "riscv"
+
 OPTIONS_DEFINE=		SSL GMP DOCS
 OPTIONS_DEFAULT=	SSL GMP