diff --git a/include/haproxy/quic_tls.h b/include/haproxy/quic_tls.h
index 209576a4e1..500f125f42 100644
--- a/include/haproxy/quic_tls.h
+++ b/include/haproxy/quic_tls.h
@@ -42,7 +42,8 @@ unsigned char initial_salt_v1[20] = {
 	0xcc, 0xbb, 0x7f, 0x0a
 };
 
-void quic_tls_keys_hexdump(struct buffer *buf, struct quic_tls_secrets *secs);
+void quic_tls_keys_hexdump(struct buffer *buf,
+                           const struct quic_tls_secrets *secs);
 
 void quic_tls_secret_hexdump(struct buffer *buf,
                              const unsigned char *secret, size_t secret_len);
diff --git a/include/haproxy/xprt_quic.h b/include/haproxy/xprt_quic.h
index 13de0f196f..7004164f2e 100644
--- a/include/haproxy/xprt_quic.h
+++ b/include/haproxy/xprt_quic.h
@@ -114,7 +114,8 @@ static inline size_t quic_cid_saddr_cat(struct quic_cid *cid,
  * debugging purposes.
  * Always succeeds.
  */
-static inline void quic_cid_dump(struct buffer *buf, struct quic_cid *cid)
+static inline void quic_cid_dump(struct buffer *buf,
+                                 const struct quic_cid *cid)
 {
 	int i;
 
diff --git a/src/quic_tls.c b/src/quic_tls.c
index fcb80a34f9..8100d47590 100644
--- a/src/quic_tls.c
+++ b/src/quic_tls.c
@@ -23,7 +23,8 @@ __attribute__((format (printf, 3, 4)))
 void hexdump(const void *buf, size_t buflen, const char *title_fmt, ...);
 
 /* Dump the RX/TX secrets of <secs> QUIC TLS secrets. */
-void quic_tls_keys_hexdump(struct buffer *buf, struct quic_tls_secrets *secs)
+void quic_tls_keys_hexdump(struct buffer *buf,
+                           const struct quic_tls_secrets *secs)
 {
 	int i;
 	size_t aead_keylen = (size_t)EVP_CIPHER_key_length(secs->aead);
diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index ae5241f6e2..c15f4b423f 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -321,9 +321,7 @@ static void quic_trace(enum trace_level level, uint64_t mask, const struct trace
 			const ssize_t *room = a4;
 
 			if (qel) {
-				struct quic_pktns *pktns;
-
-				pktns = qc->pktns;
+				const struct quic_pktns *pktns = qc->pktns;
 				chunk_appendf(&trace_buf, " qel=%c cwnd=%llu ppif=%lld pif=%llu "
 				              "if=%llu pp=%u pdg=%d",
 				              quic_enc_level_char_from_qel(qel, qc),
@@ -422,9 +420,7 @@ static void quic_trace(enum trace_level level, uint64_t mask, const struct trace
 			const struct quic_enc_level *qel = a2;
 
 			if (qel) {
-				struct quic_pktns *pktns;
-
-				pktns = qc->pktns;
+				const struct quic_pktns *pktns = qc->pktns;
 				chunk_appendf(&trace_buf,
 				              " qel=%c state=%s ack?%d cwnd=%llu ppif=%lld pif=%llu if=%llu pp=%u pdg=%llu",
 				              quic_enc_level_char_from_qel(qel, qc),