diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index a52cad5..5547c6a 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -1005,7 +1005,7 @@
 
 		return (MB_ENABLED === TRUE)
 			? ($val <= mb_strlen($str))
-			: ($val <= strlen(str));
+			: ($val <= strlen($str));
 	}
 
 	// --------------------------------------------------------------------