diff --git a/source/fitz/load-jpx.c b/source/fitz/load-jpx.c
index dd7bf9e..3a1c7a8 100644
--- a/source/fitz/load-jpx.c
+++ b/source/fitz/load-jpx.c
@@ -116,7 +116,7 @@ fz_load_jpx(fz_context *ctx, unsigned char *data, int size, fz_colorspace *defcs
opj_stream_set_read_function(stream, fz_opj_stream_read);
opj_stream_set_skip_function(stream, fz_opj_stream_skip);
opj_stream_set_seek_function(stream, fz_opj_stream_seek);
- opj_stream_set_user_data(stream, &sb);
+ opj_stream_set_user_data(stream, &sb, NULL);
/* Set the length to avoid an assert */
opj_stream_set_user_data_length(stream, size);