diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 47f13598291..4bf8cbc959b 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -3994,18 +3994,6 @@ function printCommonFooter($zone='private')
 
 }
 
-/**
- * Convert unicode
- *
- * @param	string	$unicode	Unicode
- * @param	string	$encoding	Encoding type
- * @return	string				Unicode converted
- */
-function unichr($unicode , $encoding = 'UTF-8')
-{
-	return mb_convert_encoding("&#{$unicode};", $encoding, 'HTML-ENTITIES');
-}
-
 /**
  *	Convert an array with RGB value into hex RGB value
  *
@@ -4035,11 +4023,11 @@ function getCurrencySymbol($currency_code)
 
 	$form->load_cache_currencies();
 
-	if (is_array($form->cache_currencies[$currency_code]['unicode']) && ! empty($form->cache_currencies[$currency_code]['unicode']))
+	if (function_exists("mb_convert_encoding") && is_array($form->cache_currencies[$currency_code]['unicode']) && ! empty($form->cache_currencies[$currency_code]['unicode']))
 	{
 		foreach($form->cache_currencies[$currency_code]['unicode'] as $unicode)
 		{
-			$currency_sign.= unichr($unicode);
+			$currency_sign .= mb_convert_encoding("&#{$unicode};", "UTF-8", 'HTML-ENTITIES');
 		}
 	}
 	else
diff --git a/htdocs/install/check.php b/htdocs/install/check.php
index b575e0c62a4..52a64f007fe 100644
--- a/htdocs/install/check.php
+++ b/htdocs/install/check.php
@@ -144,6 +144,18 @@ else
 	print '<img src="../theme/eldy/img/tick.png" alt="Ok"> '.$langs->trans("PHPSupportUTF8")."<br>\n";
 }
 
+// Check if mb_convert_encoding supported (used by getCurrencySymbol)
+/*if (! function_exists("mb_convert_encoding"))
+{
+	$langs->load("errors");
+	print '<img src="../theme/eldy/img/warning.png" alt="Error"> '.$langs->trans("ErrorPHPDoesNotSupportUTF8")."<br>\n";
+	// $checksok=0;		// If image ko, just warning. So check must still be 1 (otherwise no way to install)
+}
+else
+{
+	print '<img src="../theme/eldy/img/tick.png" alt="Ok"> '.$langs->trans("PHPSupportUTF8")."<br>\n";
+}*/
+
 
 // Check memory
 $memrequiredorig='32M';