diff --git a/libavfilter/vf_libopencv.c b/libavfilter/vf_libopencv.c
index 604d0299d1558289803550a4d50424e83ca2e462..55e49e137795ceef0c6db228cc54cd4cc401da64 100644
--- a/libavfilter/vf_libopencv.c
+++ b/libavfilter/vf_libopencv.c
@@ -116,7 +116,7 @@ static av_cold int smooth_init(AVFilterContext *ctx, const char *args, void *opa
 static void smooth_end_frame(AVFilterLink *inlink)
 {
     SmoothContext *smooth = inlink->dst->priv;
-    AVFilterLink *outlink= inlink->dst->outputs[0];
+    AVFilterLink *outlink = inlink->dst->outputs[0];
     AVFilterBufferRef *inpicref  = inlink ->cur_buf;
     AVFilterBufferRef *outpicref = outlink->out_buf;
     IplImage inimg, outimg;