diff --git a/auto_tests/onion_test.c b/auto_tests/onion_test.c
index 4489a894..2394e03d 100644
--- a/auto_tests/onion_test.c
+++ b/auto_tests/onion_test.c
@@ -28,7 +28,7 @@ void do_onion(Onion *onion)
 }
 
 static int handled_test_1;
-static int handle_test_1(void *object, IP_Port source, uint8_t *packet, uint32_t length)
+static int handle_test_1(void *object, IP_Port source, const uint8_t *packet, uint32_t length)
 {
     Onion *onion = object;
 
@@ -44,7 +44,7 @@ static int handle_test_1(void *object, IP_Port source, uint8_t *packet, uint32_t
 }
 
 static int handled_test_2;
-static int handle_test_2(void *object, IP_Port source, uint8_t *packet, uint32_t length)
+static int handle_test_2(void *object, IP_Port source, const uint8_t *packet, uint32_t length)
 {
     if (length != sizeof("install Gentoo"))
         return 1;
@@ -70,7 +70,7 @@ uint8_t sb_data[ONION_ANNOUNCE_SENDBACK_DATA_LENGTH];
 static int handled_test_3;
 uint8_t test_3_pub_key[crypto_box_PUBLICKEYBYTES];
 uint8_t test_3_ping_id[crypto_hash_sha256_BYTES];
-static int handle_test_3(void *object, IP_Port source, uint8_t *packet, uint32_t length)
+static int handle_test_3(void *object, IP_Port source, const uint8_t *packet, uint32_t length)
 {
     Onion *onion = object;
 
@@ -99,7 +99,7 @@ static int handle_test_3(void *object, IP_Port source, uint8_t *packet, uint32_t
 
 uint8_t nonce[crypto_box_NONCEBYTES];
 static int handled_test_4;
-static int handle_test_4(void *object, IP_Port source, uint8_t *packet, uint32_t length)
+static int handle_test_4(void *object, IP_Port source, const uint8_t *packet, uint32_t length)
 {
     Onion *onion = object;
 
diff --git a/other/bootstrap_node_packets.c b/other/bootstrap_node_packets.c
index ea57b0d2..e8df3289 100644
--- a/other/bootstrap_node_packets.c
+++ b/other/bootstrap_node_packets.c
@@ -34,7 +34,7 @@ static uint16_t bootstrap_motd_length;
 /* To request this packet just send a packet of length INFO_REQUEST_PACKET_LENGTH
  * with the first byte being BOOTSTRAP_INFO_PACKET_ID
  */
-static int handle_info_request(void *object, IP_Port source, uint8_t *packet, uint32_t length)
+static int handle_info_request(void *object, IP_Port source, const uint8_t *packet, uint32_t length)
 {
     if (length != INFO_REQUEST_PACKET_LENGTH)
         return 1;