diff --git a/libavfilter/vf_field.c b/libavfilter/vf_field.c
index ed123792b4..72cabdb929 100644
--- a/libavfilter/vf_field.c
+++ b/libavfilter/vf_field.c
@@ -33,7 +33,7 @@ enum FieldType { FIELD_TYPE_TOP = 0, FIELD_TYPE_BOTTOM };
 
 typedef struct {
     const AVClass *class;
-    enum FieldType type;
+    int type;                   ///< FieldType
     int nb_planes;              ///< number of planes of the current format
 } FieldContext;