diff --git a/modules/member/php-openid-1.2.3/Auth/OpenID/BigMath.php b/modules/member/php-openid-1.2.3/Auth/OpenID/BigMath.php
index 3113104ba..f6ffa74d9 100644
--- a/modules/member/php-openid-1.2.3/Auth/OpenID/BigMath.php
+++ b/modules/member/php-openid-1.2.3/Auth/OpenID/BigMath.php
@@ -362,7 +362,7 @@ function Auth_OpenID_detectMathLibrary($exts)
         // Try to load dynamic modules.
         if (!$loaded) {
             foreach ($extension['modules'] as $module) {
-                if (@dl($module . "." . PHP_SHLIB_SUFFIX)) {
+                if (function_exists('dl') && @dl($module . "." . PHP_SHLIB_SUFFIX)) {
                     $loaded = true;
                     break;
                 }
@@ -441,4 +441,4 @@ function &Auth_OpenID_getMathLib()
     return $lib;
 }
 
-?>
\ No newline at end of file
+?>