diff --git a/ChangeLog.d/improve_x509_cert_writing_serial_number_management.txt b/ChangeLog.d/improve_x509_cert_writing_serial_number_management.txt
index 29f16972c..1764c2f64 100644
--- a/ChangeLog.d/improve_x509_cert_writing_serial_number_management.txt
+++ b/ChangeLog.d/improve_x509_cert_writing_serial_number_management.txt
@@ -6,7 +6,7 @@ Bugfix
 
 New deprecations
    * mbedtls_x509write_crt_set_serial() is now being deprecated in favor of
-     mbedtls_x509write_crt_set_serial_new(). The goal here is to remove any
+     mbedtls_x509write_crt_set_serial_raw(). The goal here is to remove any
      direct dependency of X509 on BIGNUM_C.
 
 Changes
diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 56cc56be0..157e3a68c 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -993,7 +993,7 @@ void mbedtls_x509write_crt_set_version(mbedtls_x509write_cert *ctx, int version)
  *
  * \deprecated      This function is deprecated and will be removed in a
  *                  future version of the library. Please use
- *                  mbedtls_x509write_crt_set_serial_new() instead.
+ *                  mbedtls_x509write_crt_set_serial_raw() instead.
  *
  * \note            Even though the MBEDTLS_BIGNUM_C guard looks redundant since
  *                  X509 depends on PK and PK depends on BIGNUM, this emphasizes
@@ -1021,7 +1021,7 @@ int MBEDTLS_DEPRECATED mbedtls_x509write_crt_set_serial(
  *                  MBEDTLS_ERR_X509_BAD_INPUT_DATA if the provided input buffer
  *                  is too big (longer than MBEDTLS_X509_RFC5280_MAX_SERIAL_LEN)
  */
-int mbedtls_x509write_crt_set_serial_new(mbedtls_x509write_cert *ctx,
+int mbedtls_x509write_crt_set_serial_raw(mbedtls_x509write_cert *ctx,
                                          unsigned char *serial, size_t serial_len);
 
 /**
diff --git a/library/x509write_crt.c b/library/x509write_crt.c
index bac849f09..4f233953c 100644
--- a/library/x509write_crt.c
+++ b/library/x509write_crt.c
@@ -124,7 +124,7 @@ int mbedtls_x509write_crt_set_serial(mbedtls_x509write_cert *ctx,
 }
 #endif // MBEDTLS_BIGNUM_C && !MBEDTLS_DEPRECATED_REMOVED
 
-int mbedtls_x509write_crt_set_serial_new(mbedtls_x509write_cert *ctx,
+int mbedtls_x509write_crt_set_serial_raw(mbedtls_x509write_cert *ctx,
                                          unsigned char *serial, size_t serial_len)
 {
     if (serial_len > MBEDTLS_X509_RFC5280_MAX_SERIAL_LEN) {
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index 13debceae..287dd344a 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -736,10 +736,10 @@ usage:
     mbedtls_x509write_crt_set_version(&crt, opt.version);
     mbedtls_x509write_crt_set_md_alg(&crt, opt.md);
 
-    ret = mbedtls_x509write_crt_set_serial_new(&crt, serial, serial_len);
+    ret = mbedtls_x509write_crt_set_serial_raw(&crt, serial, serial_len);
     if (ret != 0) {
         mbedtls_strerror(ret, buf, sizeof(buf));
-        mbedtls_printf(" failed\n  !  mbedtls_x509write_crt_set_serial_new "
+        mbedtls_printf(" failed\n  !  mbedtls_x509write_crt_set_serial_raw "
                        "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf);
         goto exit;
     }
diff --git a/tests/suites/test_suite_x509write.function b/tests/suites/test_suite_x509write.function
index 5d68e1609..24094ec6a 100644
--- a/tests/suites/test_suite_x509write.function
+++ b/tests/suites/test_suite_x509write.function
@@ -397,7 +397,7 @@ void x509_crt_check(char *subject_key_file, char *subject_pwd,
                                         serial_arg->len) == 0);
     TEST_ASSERT(mbedtls_x509write_crt_set_serial(&crt, &serial_mpi) == 0);
 #else
-    TEST_ASSERT(mbedtls_x509write_crt_set_serial_new(&crt, serial_arg->x,
+    TEST_ASSERT(mbedtls_x509write_crt_set_serial_raw(&crt, serial_arg->x,
                                                      serial_arg->len) == 0);
 #endif
     TEST_ASSERT(mbedtls_x509write_crt_set_validity(&crt, not_before,
@@ -587,7 +587,7 @@ void x509_set_serial_check()
     mbedtls_mpi_free(&serial_mpi);
 #endif
 
-    TEST_EQUAL(mbedtls_x509write_crt_set_serial_new(&ctx, invalid_serial,
+    TEST_EQUAL(mbedtls_x509write_crt_set_serial_raw(&ctx, invalid_serial,
                                                     sizeof(invalid_serial)),
                MBEDTLS_ERR_X509_BAD_INPUT_DATA);