diff --git a/src/Symfony/Component/Validator/Constraints/File.php b/src/Symfony/Component/Validator/Constraints/File.php
index 5221857101af2..c70db0a74c4c1 100644
--- a/src/Symfony/Component/Validator/Constraints/File.php
+++ b/src/Symfony/Component/Validator/Constraints/File.php
@@ -102,8 +102,10 @@ private function normalizeBinaryFormat($maxSize)
         $factors = [
             'k' => 1000,
             'ki' => 1 << 10,
-            'm' => 1000000,
+            'm' => 1000 * 1000,
             'mi' => 1 << 20,
+            'g' => 1000 * 1000 * 1000,
+            'gi' => 1 << 30,
         ];
         if (ctype_digit((string) $maxSize)) {
             $this->maxSize = (int) $maxSize;
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php b/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
index d3117ed44a245..e0b6ec8f41f5d 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
@@ -97,6 +97,10 @@ public function provideValidSizes()
             ['1MI', 1048576, true],
             ['3m', 3000000, false],
             ['3M', 3000000, false],
+            ['1gi', 1073741824, true],
+            ['1GI', 1073741824, true],
+            ['4g', 4000000000, false],
+            ['4G', 4000000000, false],
         ];
     }
 
@@ -107,8 +111,6 @@ public function provideInvalidSizes()
             ['foo'],
             ['1Ko'],
             ['1kio'],
-            ['1G'],
-            ['1Gi'],
         ];
     }