diff --git a/mbtk/test/libgsw_lib/gsw_gnss_test.c b/mbtk/test/libgsw_lib/gsw_gnss_test.c
index 7878407..073068b 100755
--- a/mbtk/test/libgsw_lib/gsw_gnss_test.c
+++ b/mbtk/test/libgsw_lib/gsw_gnss_test.c
@@ -157,9 +157,9 @@
 }
 void delete_type(void)
 {
-    printf("\t0 DELETE_NOTHING\n"
-           "\t1 DELETE_EPHEMERIS\n"
-           "\t2 DELETE_ALL\n"
+    printf("\t1 DELETE_NOTHING\n"
+           "\t2 DELETE_EPHEMERIS\n"
+           "\t3 DELETE_ALL\n"
            "please input operator: >> ");
 }