diff --git a/application/core/ErrorHandler.php b/application/core/ErrorHandler.php
index 4df789d8..3c841f6d 100644
--- a/application/core/ErrorHandler.php
+++ b/application/core/ErrorHandler.php
@@ -254,9 +254,9 @@ class ErrorHandler {
 				$type = gettype($arg);
 				$string .= $type . '(';
 				if (is_string($arg)) {
-					print_r(substr($arg, 0, 20), true);
+					$string .= print_r(substr($arg, 0, 20), true);
 				} else {
-					print_r($arg, true);
+					$string .= print_r($arg, true);
 				}
 				$string .= ')';
 			}