diff --git a/libavfilter/vf_mix.c b/libavfilter/vf_mix.c
index d0cc7cb830..f84b9bd974 100644
--- a/libavfilter/vf_mix.c
+++ b/libavfilter/vf_mix.c
@@ -108,7 +108,7 @@ static av_cold int init(AVFilterContext *ctx)
             break;
 
         p = NULL;
-        sscanf(arg, "%f", &s->weights[i]);
+        av_sscanf(arg, "%f", &s->weights[i]);
         s->wfactor += s->weights[i];
         last = i;
     }