diff --git a/ssl/record/methods/dtls_meth.c b/ssl/record/methods/dtls_meth.c
index 05bfa6e2d7c9b..e24614a1bdfd9 100644
--- a/ssl/record/methods/dtls_meth.c
+++ b/ssl/record/methods/dtls_meth.c
@@ -629,7 +629,7 @@ static int dtls_free(OSSL_RECORD_LAYER *rl)
 
 static int
 dtls_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers,
-                      int role, int direction, int level, unsigned int epoch,
+                      int role, int direction, int level, uint16_t epoch,
                       unsigned char *key, size_t keylen, unsigned char *iv,
                       size_t ivlen, unsigned char *mackey, size_t mackeylen,
                       const EVP_CIPHER *ciph, size_t taglen,
diff --git a/ssl/record/methods/ktls_meth.c b/ssl/record/methods/ktls_meth.c
index 51127e41d7e12..340356ca5e5d2 100644
--- a/ssl/record/methods/ktls_meth.c
+++ b/ssl/record/methods/ktls_meth.c
@@ -481,7 +481,7 @@ static struct record_functions_st ossl_ktls_funcs = {
 
 static int
 ktls_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers,
-                      int role, int direction, int level, unsigned int epoch,
+                      int role, int direction, int level, uint16_t epoch,
                       unsigned char *key, size_t keylen, unsigned char *iv,
                       size_t ivlen, unsigned char *mackey, size_t mackeylen,
                       const EVP_CIPHER *ciph, size_t taglen,
diff --git a/ssl/record/methods/recmethod_local.h b/ssl/record/methods/recmethod_local.h
index 2fb100d5a998d..69cb77938b86c 100644
--- a/ssl/record/methods/recmethod_local.h
+++ b/ssl/record/methods/recmethod_local.h
@@ -68,7 +68,7 @@ struct ossl_record_layer_st
     int direction;
     int level;
     /* DTLS only */
-    unsigned int epoch;
+    uint16_t epoch;
 
     /*
      * A BIO containing any data read in the previous epoch that was destined
diff --git a/ssl/record/methods/tls_common.c b/ssl/record/methods/tls_common.c
index 13efb82c6125d..00454b43c82da 100644
--- a/ssl/record/methods/tls_common.c
+++ b/ssl/record/methods/tls_common.c
@@ -967,7 +967,7 @@ int tls_read_record(OSSL_RECORD_LAYER *rl, void **rechandle,  int *rversion,
     *data = rec->data + rec->off;
     *datalen = rec->length;
     if (rl->isdtls) {
-        *epoch = (uint16_t)rec->epoch;
+        *epoch = rec->epoch;
         memcpy(seq_num, rec->seq_num, sizeof(rec->seq_num));
     }
 
@@ -1160,7 +1160,7 @@ tls_int_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers,
 
 static int
 tls_new_record_layer(OSSL_LIB_CTX *libctx, const char *propq, int vers,
-                     int role, int direction, int level, unsigned int epoch,
+                     int role, int direction, int level, uint16_t epoch,
                      unsigned char *key, size_t keylen, unsigned char *iv,
                      size_t ivlen, unsigned char *mackey, size_t mackeylen,
                      const EVP_CIPHER *ciph, size_t taglen,
diff --git a/ssl/record/record.h b/ssl/record/record.h
index d3984195afdb6..d6f46efa520ee 100644
--- a/ssl/record/record.h
+++ b/ssl/record/record.h
@@ -67,7 +67,7 @@ typedef struct ssl3_record_st {
     unsigned char *comp;
     /* epoch number, needed by DTLS1 */
     /* r */
-    unsigned long epoch;
+    uint16_t epoch;
     /* sequence number, needed by DTLS1 */
     /* r */
     unsigned char seq_num[SEQ_NUM_SIZE];
@@ -100,7 +100,7 @@ typedef struct dtls1_bitmap_st {
 } DTLS1_BITMAP;
 
 typedef struct record_pqueue_st {
-    unsigned short epoch;
+    uint16_t epoch;
     struct pqueue_st *q;
 } record_pqueue;
 
@@ -110,8 +110,8 @@ typedef struct dtls_record_layer_st {
      * undefined, and starts at zero once the initial handshake is
      * completed
      */
-    unsigned short r_epoch;
-    unsigned short w_epoch;
+    uint16_t r_epoch;
+    uint16_t w_epoch;
 
     /*
      * Buffered application records. Only for records between CCS and
diff --git a/ssl/record/recordmethod.h b/ssl/record/recordmethod.h
index bbd633ffbba93..537091db8a191 100644
--- a/ssl/record/recordmethod.h
+++ b/ssl/record/recordmethod.h
@@ -147,7 +147,7 @@ struct ossl_record_method_st {
                             const char *propq, int vers,
                             int role, int direction,
                             int level,
-                            unsigned int epoch,
+                            uint16_t epoch,
                             unsigned char *key,
                             size_t keylen,
                             unsigned char *iv,
diff --git a/ssl/ssl_local.h b/ssl/ssl_local.h
index ea081815a5949..7f5c8a0ba5409 100644
--- a/ssl/ssl_local.h
+++ b/ssl/ssl_local.h
@@ -1909,7 +1909,7 @@ struct dtls1_retransmit_state {
     EVP_MD_CTX *write_hash;     /* used for mac generation */
     COMP_CTX *compress;         /* compression */
     SSL_SESSION *session;
-    unsigned short epoch;
+    uint16_t epoch;
 };
 
 struct hm_header_st {
diff --git a/test/helpers/ssltestlib.c b/test/helpers/ssltestlib.c
index d95cfef6c5741..94ea1c53d82f2 100644
--- a/test/helpers/ssltestlib.c
+++ b/test/helpers/ssltestlib.c
@@ -263,7 +263,7 @@ static void mempacket_free(MEMPACKET *pkt)
 
 typedef struct mempacket_test_ctx_st {
     STACK_OF(MEMPACKET) *pkts;
-    unsigned int epoch;
+    uint16_t epoch;
     unsigned int currrec;
     unsigned int currpkt;
     unsigned int lastpkt;