diff --git a/security/afl++/Makefile b/security/afl++/Makefile
index 9539f13c3b607..5715f836f9fbc 100644
--- a/security/afl++/Makefile
+++ b/security/afl++/Makefile
@@ -36,6 +36,7 @@ MAKEFILE=	GNUmakefile
 MAKE_ARGS=	${${ARCH} != amd64 && ${ARCH} != i386:?AFL_NO_X86=1:} \
 		PREFIX="${PREFIX}/${PKGBASE}"
 .if ${FLAVOR} == llvm
+CFLAGS_riscv64=	-mno-relax
 MAKE_ARGS+=	CC=clang${_LLVM_VER} \
 		CXX=clang++${_LLVM_VER} \
 		LLVM_CONFIG=llvm-config${_LLVM_VER}