diff --git a/mpp/hal/rkdec/h264d/hal_h264d_rkv_reg.c b/mpp/hal/rkdec/h264d/hal_h264d_rkv_reg.c
index 519008cd..4e36bd47 100644
--- a/mpp/hal/rkdec/h264d/hal_h264d_rkv_reg.c
+++ b/mpp/hal/rkdec/h264d/hal_h264d_rkv_reg.c
@@ -229,7 +229,7 @@ static RK_U32 rkv_ver_align(RK_U32 val)
 
 static RK_U32 rkv_hor_align(RK_U32 val)
 {
-    return MPP_ALIGN(val, 16);
+    return MPP_ALIGN(val, 64); // align to 64 for h264 high10
 }
 
 static RK_U32 rkv_hor_align_256_odds(RK_U32 val)
diff --git a/mpp/hal/rkdec/h264d/hal_h264d_vdpu34x.c b/mpp/hal/rkdec/h264d/hal_h264d_vdpu34x.c
index d780bd78..3de838c7 100644
--- a/mpp/hal/rkdec/h264d/hal_h264d_vdpu34x.c
+++ b/mpp/hal/rkdec/h264d/hal_h264d_vdpu34x.c
@@ -329,7 +329,7 @@ static RK_U32 rkv_ver_align(RK_U32 val)
 
 static RK_U32 rkv_hor_align(RK_U32 val)
 {
-    return MPP_ALIGN(val, 16);
+    return MPP_ALIGN(val, 64); // align to 64 for h264 high10
 }
 
 static RK_U32 rkv_hor_align_256_odds(RK_U32 val)
diff --git a/mpp/hal/rkdec/h264d/hal_h264d_vdpu382.c b/mpp/hal/rkdec/h264d/hal_h264d_vdpu382.c
index bbc7f167..79e1f5d0 100644
--- a/mpp/hal/rkdec/h264d/hal_h264d_vdpu382.c
+++ b/mpp/hal/rkdec/h264d/hal_h264d_vdpu382.c
@@ -335,7 +335,7 @@ static RK_U32 rkv_ver_align(RK_U32 val)
 
 static RK_U32 rkv_hor_align(RK_U32 val)
 {
-    return MPP_ALIGN(val, 16);
+    return MPP_ALIGN(val, 64); // align to 64 for h264 high10
 }
 
 static RK_U32 rkv_hor_align_256_odds(RK_U32 val)