1 files changed, 3 insertions, 6 deletions
diff --git a/src/exchange-lib/testing_api_trait_number.c b/src/exchange-lib/testing_api_trait_number.c
index 67b01ae8e..ee2e76dbb 100644
--- a/src/exchange-lib/testing_api_trait_number.c
+++ b/src/exchange-lib/testing_api_trait_number.c
@@ -38,29 +38,26 @@
  * @param cmd command to extract the number from.
  * @param index the number's index number.
  * @param n[out] set to the number coming from @a cmd.
- *
  * @return #GNUNET_OK on success.
  */
 int
 TALER_TESTING_get_trait_uint
   (const struct TALER_TESTING_Command *cmd,
    unsigned int index,
-   unsigned int **n)
+   const unsigned int **n)
 {
   return cmd->traits (cmd->cls,
-                      (void **) n,
+                      (const void **) n,
                       TALER_TESTING_TRAIT_UINT,
                       index);
 }
 
 
-
 /**
  * Offer a number.
  *
  * @param index the number's index number.
  * @param n the number to offer.
- *
  * @return #GNUNET_OK on success.
  */
 struct TALER_TESTING_Trait
@@ -92,7 +89,7 @@ TALER_TESTING_get_trait_uint64
    const uint64_t **n)
 {
   return cmd->traits (cmd->cls,
-                      (void **) n,
+                      (const void **) n,
                       TALER_TESTING_TRAIT_UINT64,
                       index);
 }