diff --git a/libavfilter/vf_codecview.c b/libavfilter/vf_codecview.c
index ecf000c38e..086a56c5b9 100644
--- a/libavfilter/vf_codecview.c
+++ b/libavfilter/vf_codecview.c
@@ -225,22 +225,22 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
     }
 
     if (s->mv) {
-    AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
-    if (sd) {
-        int i;
-        const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
-        for (i = 0; i < sd->size / sizeof(*mvs); i++) {
-            const AVMotionVector *mv = &mvs[i];
-            const int direction = mv->source > 0;
-            if ((direction == 0 && (s->mv & MV_P_FOR)  && frame->pict_type == AV_PICTURE_TYPE_P) ||
-                (direction == 0 && (s->mv & MV_B_FOR)  && frame->pict_type == AV_PICTURE_TYPE_B) ||
-                (direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B))
-                draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
-                           frame->width, frame->height, frame->linesize[0],
-                           100, 0, mv->source > 0);
+        AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
+        if (sd) {
+            int i;
+            const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
+            for (i = 0; i < sd->size / sizeof(*mvs); i++) {
+                const AVMotionVector *mv = &mvs[i];
+                const int direction = mv->source > 0;
+                if ((direction == 0 && (s->mv & MV_P_FOR)  && frame->pict_type == AV_PICTURE_TYPE_P) ||
+                    (direction == 0 && (s->mv & MV_B_FOR)  && frame->pict_type == AV_PICTURE_TYPE_B) ||
+                    (direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B))
+                    draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
+                               frame->width, frame->height, frame->linesize[0],
+                               100, 0, mv->source > 0);
+            }
         }
     }
-    }
 
     return ff_filter_frame(outlink, frame);
 }