diff --git a/libavfilter/graphparser.c b/libavfilter/graphparser.c
index c28d912163..46ebfdc638 100644
--- a/libavfilter/graphparser.c
+++ b/libavfilter/graphparser.c
@@ -183,7 +183,7 @@ enum LinkType {
  */
 typedef struct AVFilterInOut {
     enum LinkType type;
-    char *name;
+    const char *name;
     AVFilterContext *filter;
     int pad_idx;