diff --git a/include/mbedtls/x509_csr.h b/include/mbedtls/x509_csr.h
index 34f527b..69ff2cc 100644
--- a/include/mbedtls/x509_csr.h
+++ b/include/mbedtls/x509_csr.h
@@ -197,7 +197,7 @@
  * \param ctx       CSR context to use
  * \param key_usage key usage flags to set
  *
- * \return          0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED
+ * \return          0 if successful, or POLARSSL_ERR_X509_MALLOC_FAILED
  */
 int x509write_csr_set_key_usage( x509write_csr *ctx, unsigned char key_usage );
 
@@ -208,7 +208,7 @@
  * \param ctx           CSR context to use
  * \param ns_cert_type  Netscape Cert Type flags to set
  *
- * \return          0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED
+ * \return          0 if successful, or POLARSSL_ERR_X509_MALLOC_FAILED
  */
 int x509write_csr_set_ns_cert_type( x509write_csr *ctx,
                                     unsigned char ns_cert_type );
@@ -223,7 +223,7 @@
  * \param val       value of the extension OCTET STRING
  * \param val_len   length of the value data
  *
- * \return          0 if successful, or a POLARSSL_ERR_X509WRITE_MALLOC_FAILED
+ * \return          0 if successful, or a POLARSSL_ERR_X509_MALLOC_FAILED
  */
 int x509write_csr_set_extension( x509write_csr *ctx,
                                  const char *oid, size_t oid_len,