diff --git a/libavfilter/af_adelay.c b/libavfilter/af_adelay.c
index d6d81ba7d8..46c3d51040 100644
--- a/libavfilter/af_adelay.c
+++ b/libavfilter/af_adelay.c
@@ -249,10 +249,11 @@ static int request_frame(AVFilterLink *outlink)
 static av_cold void uninit(AVFilterContext *ctx)
 {
     AudioDelayContext *s = ctx->priv;
-    int i;
 
-    for (i = 0; i < s->nb_delays; i++)
-        av_freep(&s->chandelay[i].samples);
+    if (s->chandelay) {
+        for (int i = 0; i < s->nb_delays; i++)
+            av_freep(&s->chandelay[i].samples);
+    }
     av_freep(&s->chandelay);
 }