diff --git a/system/docs/CHANGELOG.md b/system/docs/CHANGELOG.md
index be73edad4a..42791c4d24 100644
--- a/system/docs/CHANGELOG.md
+++ b/system/docs/CHANGELOG.md
@@ -4,6 +4,9 @@ Contao Open Source CMS changelog
 Version 3.4.5 (2015-03-XX)
 --------------------------
 
+### Fixed
+Correctly calculate the max upload size in the DropZone uploader (see #7633).
+
 ### Fixed
 Ensure a unique language file array in the `Automator` class (see #7687).
 
diff --git a/system/modules/core/classes/DropZone.php b/system/modules/core/classes/DropZone.php
index 553974c258..02511d8f05 100644
--- a/system/modules/core/classes/DropZone.php
+++ b/system/modules/core/classes/DropZone.php
@@ -26,7 +26,7 @@ class DropZone extends \FileUpload
 	public function generateMarkup()
 	{
 		// Maximum file size in MB
-		$intMaxSize = ($this->getMaximumUploadSize() / 1024000);
+		$intMaxSize = ($this->getMaximumUploadSize() / 1024 / 1024);
 
 		// String of accepted file extensions
 		$strAccepted = implode(',', array_map(function($a) { return '.' . $a; }, trimsplit(',', strtolower(\Config::get('uploadTypes')))));