Index: bp-loader.php
===================================================================
--- bp-loader.php
+++ bp-loader.php
@@ -360,7 +360,7 @@
 		/** Paths******************************************************/
 
 		// BuddyPress root directory
-		$this->file           = __FILE__;
+		$this->file           = constant( 'BP_PLUGIN_DIR' ) . 'bp-loader.php';
 		$this->basename       = plugin_basename( $this->file );
 		$this->plugin_dir     = BP_PLUGIN_DIR;
 		$this->plugin_url     = BP_PLUGIN_URL;