diff --git a/wp-includes/random_compat/random.php b/wp-includes/random_compat/random.php
index 8898a35bcd..f6ffc54ff7 100644
--- a/wp-includes/random_compat/random.php
+++ b/wp-includes/random_compat/random.php
@@ -56,7 +56,7 @@ if (PHP_VERSION_ID < 70000) {
          * 
          * See ERRATA.md for our reasoning behind this particular order
          */
-        if (extension_loaded('libsodium')) {
+        if (PHP_VERSION_ID >= 50300 && extension_loaded('libsodium') && function_exists('\\Sodium\\randombytes_buf')) {
             // See random_bytes_libsodium.php
             require_once $RandomCompatDIR.'/random_bytes_libsodium.php';
         }