--- app_record.c.orig      2021-08-20 09:37:58.798189864 +0200
+++ app_record.c   2021-08-20 09:38:34.962958422 +0200
@@ -171,6 +171,15 @@
 static enum dtmf_response record_dtmf_response(struct ast_channel *chan,
        struct ast_flags *flags, int dtmf_integer, int terminator)
 {
+
+       char dtmfstr[2]="";
+
+       dtmfstr[0]=dtmf_integer;
+       dtmfstr[1]='\0';
+
+       pbx_builtin_setvar_helper(chan, "RECORD_DTMF", dtmfstr);
+
+
        if ((dtmf_integer == OPERATOR_KEY) &&
                (ast_test_flag(flags, OPTION_OPERATOR_EXIT))) {
                return RESPONSE_OPERATOR;