diff --git a/libavfilter/buffersrc.c b/libavfilter/buffersrc.c
index da1cf9941e..89efbb448a 100644
--- a/libavfilter/buffersrc.c
+++ b/libavfilter/buffersrc.c
@@ -337,6 +337,11 @@ static av_cold int init_audio(AVFilterContext *ctx)
         return AVERROR(EINVAL);
     }
 
+    if (s->sample_rate <= 0) {
+        av_log(ctx, AV_LOG_ERROR, "Sample rate not set\n");
+        return AVERROR(EINVAL);
+    }
+
     if (!s->time_base.num)
         s->time_base = (AVRational){1, s->sample_rate};