diff --git a/mpp/hal/rkdec/h264d/hal_h264d_vdpu1_reg.c b/mpp/hal/rkdec/h264d/hal_h264d_vdpu1_reg.c
index c1c53a01..7f49b36f 100644
--- a/mpp/hal/rkdec/h264d/hal_h264d_vdpu1_reg.c
+++ b/mpp/hal/rkdec/h264d/hal_h264d_vdpu1_reg.c
@@ -1142,7 +1142,6 @@ MPP_RET vdpu1_h264d_init(void *hal, MppHalCfg *cfg)
     FUN_CHECK(ret = vdpu1_set_device_regs(p_hal, (H264dVdpu1Regs_t *)p_hal->regs));
     mpp_slots_set_prop(p_hal->frame_slots, SLOTS_HOR_ALIGN, vdpu1_hor_align);
     mpp_slots_set_prop(p_hal->frame_slots, SLOTS_VER_ALIGN, vdpu1_ver_align);
-    mpp_slots_set_prop(p_hal->frame_slots, SLOTS_LEN_ALIGN, NULL);
 
     (void)cfg;
 __RETURN:
diff --git a/mpp/hal/rkdec/h264d/hal_h264d_vdpu_reg.c b/mpp/hal/rkdec/h264d/hal_h264d_vdpu_reg.c
index 87f35ba2..46a0813d 100644
--- a/mpp/hal/rkdec/h264d/hal_h264d_vdpu_reg.c
+++ b/mpp/hal/rkdec/h264d/hal_h264d_vdpu_reg.c
@@ -1100,7 +1100,6 @@ MPP_RET vdpu_h264d_init(void *hal, MppHalCfg *cfg)
     FUN_CHECK(ret = set_device_regs(p_hal, (H264dVdpuRegs_t *)p_hal->regs));
     mpp_slots_set_prop(p_hal->frame_slots, SLOTS_HOR_ALIGN, vdpu_hor_align);
     mpp_slots_set_prop(p_hal->frame_slots, SLOTS_VER_ALIGN, vdpu_ver_align);
-    mpp_slots_set_prop(p_hal->frame_slots, SLOTS_LEN_ALIGN, NULL);
 
     (void)cfg;
 __RETURN: