diff --git a/examples/sample.source.RRC/config.h b/examples/sample.source.RRC/config.h
new file mode 100644
index 0000000..2dda929
--- /dev/null
+++ b/examples/sample.source.RRC/config.h
@@ -0,0 +1,10 @@
+
+extern int opt_debug;
+
+#define	ASN_DEBUG(fmt, args...)	do {		\
+		if(opt_debug < 2) break;	\
+		fprintf(stderr, fmt, ##args);	\
+		fprintf(stderr, " (%s:%d)\n",	\
+			__FILE__, __LINE__);	\
+	} while(0)
+