1 files changed, 3 insertions, 1 deletions
diff --git a/gps_json.h b/gps_json.h
index 91306097..1da124a3 100644
--- a/gps_json.h
+++ b/gps_json.h
@@ -13,7 +13,9 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-void json_data_report(gps_mask_t, struct gps_device_t *, struct policy_t *,
+void json_data_report(const gps_mask_t, 
+		      const struct gps_device_t *, 
+		      const struct policy_t *,
 		      /*@out@*/char *, size_t);
 char *json_stringify(/*@out@*/char *, size_t, /*@in@*/const char *);
 void json_tpv_dump(const struct gps_device_t *,