diff --git a/mach/vax4/as/mach3.c b/mach/vax4/as/mach3.c
index 7edc1feb..f5f70757 100644
--- a/mach/vax4/as/mach3.c
+++ b/mach/vax4/as/mach3.c
@@ -231,6 +231,8 @@
 0,		OP1_Bw,		0x31,		"brw",
 0,		OP1_Be,		0x11,		"jbr",
 0,		OP1_Bx,		0x10,		"bsb",
+0,		OP1_Bb,		0x10,		"bsbb",
+0,		OP1_Bw,		0x30,		"bsbw",
 0,		CASE_b_b_b,	0x8f,		"caseb",
 0,		CASE_w_w_w,	0xaf,		"casew",
 0,		CASE_l_l_l,	0xcf,		"casel",