diff --git a/include/mbedtls/x509_csr.h b/include/mbedtls/x509_csr.h
index 80adb19..513a83e 100644
--- a/include/mbedtls/x509_csr.h
+++ b/include/mbedtls/x509_csr.h
@@ -180,7 +180,7 @@
  * \brief           Set the subject name for a CSR
  *                  Subject names should contain a comma-separated list
  *                  of OID types and values:
- *                  e.g. "C=UK,O=ARM,CN=mbed TLS Server 1"
+ *                  e.g. "C=UK,O=ARM,CN=Mbed TLS Server 1"
  *
  * \param ctx           CSR context to use
  * \param subject_name  subject name to set