diff --git a/src/or/buffers.c b/src/or/buffers.c
index 5960eff2f7..fb0e2f1064 100644
--- a/src/or/buffers.c
+++ b/src/or/buffers.c
@@ -119,9 +119,9 @@ int find_on_inbuf(char *string, int string_len, buf_t *buf) {
  */
 buf_t *buf_new_with_capacity(size_t size) {
   buf_t *buf;
-  buf = (buf_t*)tor_malloc(sizeof(buf_t));
+  buf = tor_malloc(sizeof(buf_t));
   buf->magic = BUFFER_MAGIC;
-  buf->mem = (char *)tor_malloc(size);
+  buf->mem = tor_malloc(size);
   buf->len = size;
   buf->datalen = 0;
 //  memset(buf->mem,0,size);
diff --git a/src/or/onion.c b/src/or/onion.c
index 7d979d503e..295dc4fec2 100644
--- a/src/or/onion.c
+++ b/src/or/onion.c
@@ -513,7 +513,7 @@ int onion_extend_cpath(crypt_path_t **head_ptr, cpath_build_state_t *state, rout
   log_fn(LOG_DEBUG,"Chose router %s for hop %d (exit is %s)",
          choice->nickname, cur_len, state->chosen_exit);
 
-  hop = (crypt_path_t *)tor_malloc_zero(sizeof(crypt_path_t));
+  hop = tor_malloc_zero(sizeof(crypt_path_t));
 
   /* link hop into the cpath, at the end. */
   onion_append_to_cpath(head_ptr, hop);
@@ -568,7 +568,7 @@ onion_skin_create(crypto_pk_env_t *dest_router_key,
   pkbytes = crypto_pk_keysize(dest_router_key);
   assert(dhbytes == 128);
   assert(pkbytes == 128);
-  challenge = (char *)tor_malloc_zero(ONIONSKIN_CHALLENGE_LEN-CIPHER_KEY_LEN);
+  challenge = tor_malloc_zero(ONIONSKIN_CHALLENGE_LEN-CIPHER_KEY_LEN);
 
   if (crypto_dh_get_public(dh, challenge, dhbytes))
     goto err;