diff --git a/libavcodec/riscv/startcode_rvv.S b/libavcodec/riscv/startcode_rvv.S
index 7c43b1d7f3..36a3369431 100644
--- a/libavcodec/riscv/startcode_rvv.S
+++ b/libavcodec/riscv/startcode_rvv.S
@@ -37,6 +37,8 @@ func ff_startcode_find_candidate_rvv, zve32x
         bgez     t2, 2f
         add      t0, t0, t1
         bnez     a1, 1b
+
+        mv       t2, zero
 2:
         add      t0, t0, t2
         sub      a0, t0, a0