diff --git a/src/bp-loader.php b/src/bp-loader.php
index 31acc4d..d6cffe4 100644
--- a/src/bp-loader.php
+++ b/src/bp-loader.php
@@ -24,7 +24,19 @@
 // Exit if accessed directly
 defined( 'ABSPATH' ) || exit;
 
-/** Constants *****************************************************************/
+if ( version_compare( PHP_VERSION, '5.3', '<' ) ) {
+	if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
+		$callback = function() {
+			echo '<div class="error"><p>Your PHP is old, yo.</p></div>';
+		};
+
+		add_action( 'admin_notices', $callback );
+		add_action( 'network_admin_notices', $callback );
+	}
+
+	return;
+}
+
 
 if ( !class_exists( 'BuddyPress' ) ) :
 /**