diff --git a/src/OS/Guess.php b/src/OS/Guess.php
index 0e37a09..88cd659 100644
--- a/src/OS/Guess.php
+++ b/src/OS/Guess.php
@@ -245,7 +245,7 @@ function _readGlibCVersionFromFeaturesHeaderFile()
             return array();
         }
         if (!@file_exists('/usr/bin/cpp') || !@is_executable('/usr/bin/cpp')) {
-            return $this->_parseFeaturesHeaderFile($features_header_file);
+            return $this-_parseFeaturesHeaderFile($features_header_file);
         } // no cpp
 
         return $this->_fromGlibCTest();
diff --git a/src/PEAR.php b/src/PEAR.php
index 27b1b4b..6dba3b0 100644
--- a/src/PEAR.php
+++ b/src/PEAR.php
@@ -219,7 +219,7 @@ public function __call($method, $arguments)
             );
         }
         return call_user_func_array(
-            array(self::class, '_' . $method),
+            array(get_class(), '_' . $method),
             array_merge(array($this), $arguments)
         );
     }
@@ -232,7 +232,7 @@ public static function __callStatic($method, $arguments)
             );
         }
         return call_user_func_array(
-            array(self::class, '_' . $method),
+            array(get_class(), '_' . $method),
             array_merge(array(null), $arguments)
         );
     }