diff --git a/mbtk/libmbtk_lib/src/mbtk_debug.c b/mbtk/libmbtk_lib/src/mbtk_debug.c
index 84e13e0..e9280c9 100755
--- a/mbtk/libmbtk_lib/src/mbtk_debug.c
+++ b/mbtk/libmbtk_lib/src/mbtk_debug.c
@@ -328,6 +328,7 @@
         } while(0)
 
 
+// arm-openwrt-linux-addr2line -e out/bin/mbtk_gnssd 0x12ca8
 void mbtk_debug_open(const char *log_file, bool thread_support)
 {
     struct sigaction sa;