diff --git a/share/mk/bsd.gcc.mk b/share/mk/bsd.gcc.mk
index e132ae809..5366519ad 100644
--- a/share/mk/bsd.gcc.mk
+++ b/share/mk/bsd.gcc.mk
@@ -1,2 +1,2 @@
 AFLAGS+=-D__ASSEMBLY__ -D_EM_WSIZE=4
-CFLAGS+= -fno-builtin -Wall
+CFLAGS+= -fno-builtin -Wall -march=i586