diff --git a/qemu/target/arm/translate-a64.c b/qemu/target/arm/translate-a64.c
index b757e593..69cadeb1 100644
--- a/qemu/target/arm/translate-a64.c
+++ b/qemu/target/arm/translate-a64.c
@@ -7148,6 +7148,7 @@ static void disas_simd_ext(DisasContext *s, uint32_t insn)
     tcg_temp_free_i64(tcg_ctx, tcg_resl);
     write_vec_element(s, tcg_resh, rd, 1, MO_64);
     tcg_temp_free_i64(tcg_ctx, tcg_resh);
+    clear_vec_high(s, true, rd);
 }
 
 /* TBL/TBX