diff --git a/src/cpu/x86_ops_misc.h b/src/cpu/x86_ops_misc.h
index 419ee7dc2..8e9c9f785 100644
--- a/src/cpu/x86_ops_misc.h
+++ b/src/cpu/x86_ops_misc.h
@@ -743,7 +743,7 @@ opLOCK(uint32_t fetchdat)
     if (legal == 1)
         legal = ((fetch_dat.b[1] >> 6) != 0x03);    /* reg is illegal */
     else if (legal == 2) {
-        legal = lock_legal[fetch_dat.b[1]];
+        legal = lock_legal_0f[fetch_dat.b[1]];
         if (legal == 1)
             legal = ((fetch_dat.b[2] >> 6) != 0x03);    /* reg,reg is illegal */
         else if (legal == 3) {