diff --git a/library/x509_crt.c b/library/x509_crt.c
index a0d35ae..bf06872 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -1384,10 +1384,10 @@
     return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, 0, NULL ) );
 }
 
-int mbedtls_x509_crt_parse_der_ext( mbedtls_x509_crt *chain,
-                                const unsigned char *buf,
-                                size_t buflen,
-                                mbedtls_x509_crt_ext_cb_t cb )
+int mbedtls_x509_crt_parse_der_with_ext_cb( mbedtls_x509_crt *chain,
+                                            const unsigned char *buf,
+                                            size_t buflen,
+                                            mbedtls_x509_crt_ext_cb_t cb )
 {
     return( mbedtls_x509_crt_parse_der_internal( chain, buf, buflen, 1, cb ) );
 }