diff --git a/lib/settings.php b/lib/settings.php
index c71f9b4..8cc8684 100644
--- a/lib/settings.php
+++ b/lib/settings.php
@@ -53,6 +53,8 @@ function numClean($var) {
 
 // returns a UTF8 based string with any UFT8 BOM removed
 function toUTF8noBOM($string,$message) {
+	// Attempt to detect encoding
+	$encType = mb_detect_encoding($string);
 	// Get rid of any UTF-8 BOM
 	$string = preg_replace('/\x{EF}\x{BB}\x{BF}/','',$string);
 	// Test for any bad characters
@@ -60,7 +62,7 @@ function toUTF8noBOM($string,$message) {
 	$teststringBroken = utf8_decode($teststring);
 	$teststringConverted = iconv("UTF-8", "UTF-8//IGNORE", $teststringBroken);
 	// If we have a matching length, UTF8 encode it
-	if (strlen($teststringConverted) == strlen($teststringBroken)) {
+	if ($encType != "ASCII" && strlen($teststringConverted) == strlen($teststringBroken)) {
 		$string = utf8_encode($string);
 		if ($message) {
 			echo "<script>top.ICEcoder.message('Your document doesn\'t appear to be in UTF-8 encoding so has been converted.');</script>";