diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 1ba98be..fe75027 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -740,7 +740,7 @@
 		
 		if (is_array($field))
 		{
-			if ( ! in_array($value, $field, TRUE))
+			if ( ! in_array($value, $field))
 			{
 				return '';
 			}
@@ -784,7 +784,7 @@
 		
 		if (is_array($field))
 		{
-			if ( ! in_array($value, $field, TRUE))
+			if ( ! in_array($value, $field))
 			{
 				return '';
 			}
@@ -828,7 +828,7 @@
 		
 		if (is_array($field))
 		{
-			if ( ! in_array($value, $field, TRUE))
+			if ( ! in_array($value, $field))
 			{
 				return '';
 			}