diff --git a/libavfilter/vf_lut3d.c b/libavfilter/vf_lut3d.c
index 9e820a17c9..fda85b16b4 100644
--- a/libavfilter/vf_lut3d.c
+++ b/libavfilter/vf_lut3d.c
@@ -805,7 +805,7 @@ static av_cold int lut3d_init(AVFilterContext *ctx)
         return set_identity_matrix(ctx, 32);
     }
 
-    f = fopen(lut3d->file, "r");
+    f = av_fopen_utf8(lut3d->file, "r");
     if (!f) {
         ret = AVERROR(errno);
         av_log(ctx, AV_LOG_ERROR, "%s: %s\n", lut3d->file, av_err2str(ret));
@@ -1588,7 +1588,7 @@ static av_cold int lut1d_init(AVFilterContext *ctx)
         return 0;
     }
 
-    f = fopen(lut1d->file, "r");
+    f = av_fopen_utf8(lut1d->file, "r");
     if (!f) {
         ret = AVERROR(errno);
         av_log(ctx, AV_LOG_ERROR, "%s: %s\n", lut1d->file, av_err2str(ret));