diff --git a/qemu/target-i386/translate.c b/qemu/target-i386/translate.c
index b89579a6..3c94d54d 100644
--- a/qemu/target-i386/translate.c
+++ b/qemu/target-i386/translate.c
@@ -5008,6 +5008,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
     bool changed_cc_op = false;
 
     s->pc = pc_start;
+    s->prefix = 0;
 
     // end address tells us to stop emulation
     if (s->pc == s->uc->addr_end) {