diff --git a/sysutils/conserve/Makefile b/sysutils/conserve/Makefile
index 4311ac957b66..b8120b70f8ae 100644
--- a/sysutils/conserve/Makefile
+++ b/sysutils/conserve/Makefile
@@ -16,6 +16,8 @@ USES=		cargo
 USE_GITHUB=	yes
 GH_ACCOUNT=	sourcefrog
 
+RUSTFLAGS=	${ARCH:S/i386/YES/:C/^[a-z].*//:S/YES/-C target-feature=+sse,+sse2/} # add sse sse2 target-features only on i386
+
 CARGO_CRATES=	addr2line-0.21.0 \
 		adler-1.0.2 \
 		ahash-0.8.11 \