diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
index 8eddd85070285..fe9002fe47f5b 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
@@ -282,7 +282,7 @@ private function round($number)
                     break;
             }
 
-            $number /= $roundingCoef;
+            $number = 1 === $roundingCoef ? (int) $number : $number / $roundingCoef;
         }
 
         return $number;