diff --git a/applications/core.c b/applications/core.c
index c7d0074..ef81289 100644
--- a/applications/core.c
+++ b/applications/core.c
@@ -155,7 +155,7 @@ void initFiles()
             const char *cfgstr =
                     "{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"coordinates\":[[[109.85768145990244,18.422149049902515],[109.85578152088834,18.418353201926465],[109.86089674131063,18.41424527209267],[109.86531775324693,18.418387867583846],[109.86491584307038,18.421785068111333],[109.85768145990244,18.422149049902515]]],\"type\":\"Polygon\"}}]}";
             LOG_W("no map file found, creat map one.");
-            int fd = open(LJW_CFG_FILE_NAME, O_WRONLY | O_CREAT);
+            int fd = open("map.geojson", O_WRONLY | O_CREAT);
             if (fd > 0) {
                 write(fd, cfgstr, strlen(cfgstr));
                 close(fd);