diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index e537cde..f8073d2 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -58,7 +58,7 @@
 		$extension = end($x);
 
 		// Load the mime types
-		if (is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
+		if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
 		{
 			include(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT);
 		}
diff --git a/system/helpers/file_helper.php b/system/helpers/file_helper.php
index 7a35c3f..4434494 100644
--- a/system/helpers/file_helper.php
+++ b/system/helpers/file_helper.php
@@ -352,7 +352,7 @@
 
 		if ( ! is_array($mimes))
 		{
-			if (is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
+			if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
 			{
 				include(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT);
 			}
diff --git a/system/helpers/html_helper.php b/system/helpers/html_helper.php
index 53fc899..c6103ab 100644
--- a/system/helpers/html_helper.php
+++ b/system/helpers/html_helper.php
@@ -258,7 +258,7 @@
 
 		if ( ! is_array($_doctypes))
 		{
-			if (is_file(APPPATH.'config/'.ENVIRONMENT.'/doctypes'.EXT))
+			if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/doctypes'.EXT))
 			{
 				include(APPPATH.'config/'.ENVIRONMENT.'/doctypes'.EXT);
 			}
diff --git a/system/helpers/smiley_helper.php b/system/helpers/smiley_helper.php
index 6c90151..a2d1031 100644
--- a/system/helpers/smiley_helper.php
+++ b/system/helpers/smiley_helper.php
@@ -229,26 +229,21 @@
 {
 	function _get_smiley_array()
 	{
-		if ( ! file_exists(APPPATH.'config/smileys'.EXT) AND ! file_exists(APPPATH.'config/'.ENVIRONMENT.'/smileys'.EXT))
-		{
-			return FALSE;
-		}
-
-		if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/smileys'.EXT))
+		if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/smileys'.EXT))
 		{
 		    include(APPPATH.'config/'.ENVIRONMENT.'/smileys'.EXT);
 		}
-		else
+		elseif (file_exists(APPPATH.'config/smileys'.EXT))
 		{
 			include(APPPATH.'config/smileys'.EXT);
 		}
 		
-		if ( ! isset($smileys) OR ! is_array($smileys))
+		if (isset($smileys) AND is_array($smileys))
 		{
-			return FALSE;
+			return $smileys;
 		}
 
-		return $smileys;
+		return FALSE;
 	}
 }
 
diff --git a/system/helpers/text_helper.php b/system/helpers/text_helper.php
index 6644089..cca0939 100644
--- a/system/helpers/text_helper.php
+++ b/system/helpers/text_helper.php
@@ -366,7 +366,7 @@
 {
 	function convert_accented_characters($str)
 	{
-		if (is_file(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT))
+		if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT))
 		{
 			include(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT);
 		}