diff --git a/src/tools/bwccmdl.c b/src/tools/bwccmdl.c
index cf7a4cc..38de588 100644
--- a/src/tools/bwccmdl.c
+++ b/src/tools/bwccmdl.c
@@ -1416,6 +1416,8 @@ int main(int argc, char *argv[])
           printf("%s", cli_verbose);
         }
 
+      bwc_set_aux(stream, (char*)data->aux.ptr, data->aux.len);
+
       /* Initialize the rate control string according to the  *
        * specified bit rate/compression ratio.                */
       if (bwc_create_compression(coder, stream, rate) == EXIT_FAILURE)