Index: src/class-buddypress.php
===================================================================
--- src/class-buddypress.php
+++ src/class-buddypress.php
@@ -508,7 +508,8 @@
 			require( $this->plugin_dir . 'bp-core/deprecated/3.0.php' );
 		}
 
-		if ( defined( 'WP_CLI' ) && file_exists( $this->plugin_dir . 'cli/wp-cli-bp.php' ) ) {
+		// Load wp-cli module if PHP 5.4+
+		if ( defined( 'WP_CLI' ) && file_exists( $this->plugin_dir . 'cli/wp-cli-bp.php' ) && version_compare( phpversion(), '5.4.0', '>=' ) ) {
 			require( $this->plugin_dir . 'cli/wp-cli-bp.php' );
 		}
 	}