--- a/src/openvpn/ssl_mbedtls.c
+++ b/src/openvpn/ssl_mbedtls.c
@@ -1336,7 +1336,7 @@ const char *
 get_ssl_library_version(void)
 {
     static char mbedtls_version[30];
-    unsigned int pv = mbedtls_version_get_number();
+    unsigned int pv = MBEDTLS_VERSION_NUMBER;
     sprintf( mbedtls_version, "mbed TLS %d.%d.%d",
              (pv>>24)&0xff, (pv>>16)&0xff, (pv>>8)&0xff );
     return mbedtls_version;
