diff --git a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
index 59e8664798..92fec99b5b 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
@@ -160,7 +160,7 @@ class DbalLoggerTest extends \PHPUnit_Framework_TestCase
         $dbalLogger
             ->expects($this->once())
             ->method('log')
-            ->with('SQL', array('short' => $shortString, 'long' => mb_substr($longString, 0, DbalLogger::MAX_STRING_LENGTH - 6, mb_detect_encoding($longString)).' [...]'))
+            ->with('SQL', array('short' => $shortString, 'long' => mb_substr($longString, 0, DbalLogger::MAX_STRING_LENGTH - 6, 'UTF-8').' [...]'))
         ;
 
         $dbalLogger->startQuery('SQL', array(
diff --git a/src/Symfony/Component/Console/Application.php b/src/Symfony/Component/Console/Application.php
index f8bd1d0582..eb665e5bdb 100644
--- a/src/Symfony/Component/Console/Application.php
+++ b/src/Symfony/Component/Console/Application.php
@@ -1089,7 +1089,7 @@ class Application
             return strlen($string);
         }
 
-        if (false === $encoding = mb_detect_encoding($string)) {
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
             return strlen($string);
         }
 
@@ -1106,7 +1106,7 @@ class Application
             return str_split($string, $width);
         }
 
-        if (false === $encoding = mb_detect_encoding($string)) {
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
             return str_split($string, $width);
         }
 
diff --git a/src/Symfony/Component/Console/Helper/Helper.php b/src/Symfony/Component/Console/Helper/Helper.php
index dc42600de8..dcdca6da24 100644
--- a/src/Symfony/Component/Console/Helper/Helper.php
+++ b/src/Symfony/Component/Console/Helper/Helper.php
@@ -53,7 +53,7 @@ abstract class Helper implements HelperInterface
             return strlen($string);
         }
 
-        if (false === $encoding = mb_detect_encoding($string)) {
+        if (false === $encoding = mb_detect_encoding($string, null, true)) {
             return strlen($string);
         }
 
diff --git a/src/Symfony/Component/Console/Helper/TableHelper.php b/src/Symfony/Component/Console/Helper/TableHelper.php
index 7d624771db..00814ecdd9 100644
--- a/src/Symfony/Component/Console/Helper/TableHelper.php
+++ b/src/Symfony/Component/Console/Helper/TableHelper.php
@@ -386,7 +386,7 @@ class TableHelper extends Helper
         $width = $this->getColumnWidth($column);
 
         // str_pad won't work properly with multi-byte strings, we need to fix the padding
-        if (function_exists('mb_strwidth') && false !== $encoding = mb_detect_encoding($cell)) {
+        if (function_exists('mb_strwidth') && false !== $encoding = mb_detect_encoding($cell, null, true)) {
             $width += strlen($cell) - mb_strwidth($cell, $encoding);
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
index 79423cea3b..7cc3d5c805 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
@@ -132,7 +132,7 @@ class NumberToLocalizedStringTransformer implements DataTransformerInterface
             throw new TransformationFailedException('I don\'t have a clear idea what infinity looks like');
         }
 
-        if (function_exists('mb_detect_encoding') && false !== $encoding = mb_detect_encoding($value)) {
+        if (function_exists('mb_detect_encoding') && false !== $encoding = mb_detect_encoding($value, null, true)) {
             $length = mb_strlen($value, $encoding);
             $remainder = mb_substr($value, $position, $length, $encoding);
         } else {