diff --git a/math/libdivide/Makefile b/math/libdivide/Makefile
index 689e0e917306..cce21f560ffe 100644
--- a/math/libdivide/Makefile
+++ b/math/libdivide/Makefile
@@ -1,26 +1,31 @@
 # Created by: thierry@pompo.net
 
 PORTNAME=	libdivide
 DISTVERSION=	5.0
 CATEGORIES=	math
 
 MAINTAINER=	thierry@FreeBSD.org
 COMMENT=	Fast prime counting function implementations
 
 LICENSE=	ZLIB BSL
 LICENSE_COMB=	multi
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	ridiculousfish
 
 USES=		cmake compiler:c++11-lang
 NO_ARCH=	yes
 
+# NEON support requires arm64
+CMAKE_OFF_armv6=	LIBDIVIDE_NEON
+CMAKE_OFF_armv7=	LIBDIVIDE_NEON
+CMAKE_OFF=	${CMAKE_OFF_${ARCH}}
+
 PLIST_FILES=	include/libdivide.h	\
 		lib/cmake/libdivide/libdivideConfig.cmake	\
 		lib/cmake/libdivide/libdivideConfigVersion.cmake
 
 do-test:
 	${CONFIGURE_WRKSRC}/tester
 
 .include <bsd.port.mk>