diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index 8f5271a..7f76977 100644
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -188,7 +188,7 @@
 	if ($EXT->call_hook('cache_override') === FALSE
 		&& $OUT->_display_cache($CFG, $URI) === TRUE)
 	{
-		exit(EXIT_SUCCESS);
+		exit;
 	}
 
 /*
diff --git a/system/core/Output.php b/system/core/Output.php
index 1025703..25ecd49 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -696,7 +696,7 @@
 		if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $last_modified <= strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']))
 		{
 			$this->set_status_header(304);
-			exit(EXIT_SUCCESS);
+			exit;
 		}
 		else
 		{
diff --git a/system/helpers/url_helper.php b/system/helpers/url_helper.php
index 7d5ccff..d0fab3f 100644
--- a/system/helpers/url_helper.php
+++ b/system/helpers/url_helper.php
@@ -550,7 +550,7 @@
 				header('Location: '.$uri, TRUE, $code);
 				break;
 		}
-		exit(EXIT_SUCCESS);
+		exit;
 	}
 }
 
diff --git a/system/libraries/Trackback.php b/system/libraries/Trackback.php
index ea8017e..ecc7129 100644
--- a/system/libraries/Trackback.php
+++ b/system/libraries/Trackback.php
@@ -212,7 +212,7 @@
 	public function send_error($message = 'Incomplete Information')
 	{
 		echo '<?xml version="1.0" encoding="utf-8"?'.">\n<response>\n<error>1</error>\n<message>".$message."</message>\n</response>";
-		exit(EXIT_SUCCESS);
+		exit;
 	}
 
 	// --------------------------------------------------------------------
@@ -228,7 +228,7 @@
 	public function send_success()
 	{
 		echo '<?xml version="1.0" encoding="utf-8"?'.">\n<response>\n<error>0</error>\n</response>";
-		exit(EXIT_SUCCESS);
+		exit;
 	}
 
 	// --------------------------------------------------------------------