diff --git a/qemu/target/i386/translate.c b/qemu/target/i386/translate.c
index 2cc88f23..fc06162e 100644
--- a/qemu/target/i386/translate.c
+++ b/qemu/target/i386/translate.c
@@ -5476,6 +5476,9 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             gen_jr(s, s->T0);
             break;
         case 3: /* lcall Ev */
+            if (mod == 3) {
+                goto illegal_op;
+            }
             gen_op_ld_v(s, ot, s->T1, s->A0);
             gen_add_A0_im(s, 1 << ot);
             gen_op_ld_v(s, MO_16, s->T0, s->A0);
@@ -5503,6 +5506,9 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             gen_jr(s, s->T0);
             break;
         case 5: /* ljmp Ev */
+            if (mod == 3) {
+                goto illegal_op;
+            }
             gen_op_ld_v(s, ot, s->T1, s->A0);
             gen_add_A0_im(s, 1 << ot);
             gen_op_ld_v(s, MO_16, s->T0, s->A0);