diff --git a/spike_main/disasm.cc b/spike_main/disasm.cc
index fe6be509..293539ff 100644
--- a/spike_main/disasm.cc
+++ b/spike_main/disasm.cc
@@ -781,7 +781,9 @@ disassembler_t::disassembler_t(int xlen)
 
   #define DISASM_OPIV_W___INSN(name, sign) \
     add_insn(new disasm_insn_t(#name ".wv", match_##name##_wv, mask_##name##_wv, \
-                {&vd, &vs2, &vs1, &opt, &vm}));
+                {&vd, &vs2, &vs1, &opt, &vm})); \
+    add_insn(new disasm_insn_t(#name ".wx", match_##name##_wv, mask_##name##_wv, \
+                {&vd, &vs2, &xrs1, &opt, &vm}));
 
   #define DISASM_OPIV_M___INSN(name, sign) \
     add_insn(new disasm_insn_t(#name ".mm", match_##name##_mm, mask_##name##_mm, \