diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 828b0286ab..2c07a924a0 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -96,7 +96,7 @@ static int link_in_config_props(AVFilterLink *link)
 }
 
 /**
- * Given the link between the dummy filter and an internal filter whose input
+ * Given the link between the dummy filter and an internal filter whose output
  * is being exported outside the graph, this returns the externally visible
  * link.
  */