1 files changed, 1 insertions, 1 deletions

diff --git a/src/include/gnunet_curl_lib.h b/src/include/gnunet_curl_lib.h
index 098b4dc37..db04f1233 100644
--- a/src/include/gnunet_curl_lib.h
+++ b/src/include/gnunet_curl_lib.h
@@ -113,7 +113,7 @@ struct GNUNET_CURL_Job;
 typedef void
 (*GNUNET_CURL_JobCompletionCallback)(void *cls,
                                      long response_code,
-                                     json_t *json);
+                                     const json_t *json);
 
 
 /**