diff --git a/security/mkp224o/Makefile b/security/mkp224o/Makefile
index 7a28d4c31fda..a300c9483751 100644
--- a/security/mkp224o/Makefile
+++ b/security/mkp224o/Makefile
@@ -13,7 +13,7 @@ LICENSE_FILE=	${WRKSRC}/COPYING.txt
 
 LIB_DEPENDS=	libsodium.so:security/libsodium
 
-USES=		autoreconf gmake localbase:ldflags
+USES=		autoreconf compiler:c11 gmake localbase:ldflags
 USE_GITHUB=	yes
 GH_ACCOUNT=	cathugger
 GNU_CONFIGURE=	yes