1 files changed, 1 insertions, 2 deletions
diff --git a/pbkdf2.c b/pbkdf2.c
index aa30bb5..87ff574 100644
--- a/pbkdf2.c
+++ b/pbkdf2.c
@@ -90,7 +90,6 @@ hal_error_t hal_pbkdf2(hal_core_t *core,
   unsigned iteration;
   hal_error_t err;
   uint32_t block;
-  int i;
 
   if (descriptor == NULL || password == NULL || salt == NULL ||
       derived_key == NULL || derived_key_length == 0 ||
@@ -148,7 +147,7 @@ hal_error_t hal_pbkdf2(hal_core_t *core,
                          0, mac, sizeof(mac))) != HAL_OK)
         return err;
 
-      for (i = 0; i < descriptor->digest_length; i++)
+      for (size_t i = 0; i < descriptor->digest_length; i++)
         result[i] ^= mac[i];
     }