diff --git a/security/seal/Makefile b/security/seal/Makefile
index ab3c522729d6..57ec491d01b7 100644
--- a/security/seal/Makefile
+++ b/security/seal/Makefile
@@ -10,7 +10,7 @@ COMMENT=	Microsoft Simple Encrypted Arithmetic Library
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-USES=	cmake
+USES=		cmake compiler:c++17-lang
 
 CMAKE_SOURCE_PATH=	${WRKSRC}/src