diff --git a/libavfilter/aeval.c b/libavfilter/aeval.c
index 45629a98ea..69de1f793f 100644
--- a/libavfilter/aeval.c
+++ b/libavfilter/aeval.c
@@ -217,6 +217,7 @@ static av_cold void uninit(AVFilterContext *ctx)
         eval->expr[i] = NULL;
     }
     av_freep(&eval->expr);
+    av_freep(&eval->channel_values);
 }
 
 static int config_props(AVFilterLink *outlink)