diff --git a/Loader/MoFileLoader.php b/Loader/MoFileLoader.php
index 8c5216f6..ce8611cd 100644
--- a/Loader/MoFileLoader.php
+++ b/Loader/MoFileLoader.php
@@ -22,13 +22,13 @@ class MoFileLoader extends FileLoader
      * Magic used for validating the format of an MO file as well as
      * detecting if the machine used to create that file was little endian.
      */
-    public const MO_LITTLE_ENDIAN_MAGIC = 0x950412de;
+    public const MO_LITTLE_ENDIAN_MAGIC = 0x950412DE;
 
     /**
      * Magic used for validating the format of an MO file as well as
      * detecting if the machine used to create that file was big endian.
      */
-    public const MO_BIG_ENDIAN_MAGIC = 0xde120495;
+    public const MO_BIG_ENDIAN_MAGIC = 0xDE120495;
 
     /**
      * The size of the header of an MO file in bytes.