diff --git a/libavfilter/vf_lut3d.c b/libavfilter/vf_lut3d.c
index 6768550cea..3ef31ce6c2 100644
--- a/libavfilter/vf_lut3d.c
+++ b/libavfilter/vf_lut3d.c
@@ -58,7 +58,7 @@ struct rgbvec {
 
 typedef struct LUT3DContext {
     const AVClass *class;
-    enum interp_mode interpolation;
+    int interpolation;          ///<interp_mode
     char *file;
     uint8_t rgba_map[4];
     int step;