diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 3b43d006..a335f69c 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3624,7 +3624,15 @@ class Net_SSH2
      */
     function _is_includable($suffix)
     {
-        foreach (explode(PATH_SEPARATOR, get_include_path()) as $prefix) {
+        // stream_resolve_include_path was introduced in PHP 5.3.2
+        if (function_exists('stream_resolve_include_path')) {
+            return stream_resolve_include_path($suffix) !== false;
+        }
+
+        $paths = PATH_SEPARATOR == ':' ?
+            preg_split('#(?<!phar):#', get_include_path()) :
+            explode(PATH_SEPARATOR, get_include_path());
+        foreach ($paths as $prefix) {
             $ds = substr($prefix, -1) == DIRECTORY_SEPARATOR ? '' : DIRECTORY_SEPARATOR;
             $file = $prefix . $ds . $suffix;