diff --git a/src/filo-fs-ext2.adb b/src/filo-fs-ext2.adb
index cfd3e0d..8197733 100644
--- a/src/filo-fs-ext2.adb
+++ b/src/filo-fs-ext2.adb
@@ -355,7 +355,7 @@
       --
 
       Extent_Header_Size : constant := 12;
-      Extent_Header_Magic : constant := 16#f03a#;
+      Extent_Header_Magic : constant := 16#f30a#;
       subtype Extent_Off is Natural range 0 .. Extent_Header_Size;
       subtype Extent_Idx is Natural range 1 .. (Max_Block_Index'Last + 1) / Extent_Header_Size - 1;
       Dynamic_Max_Index : constant Extent_Idx := State.Static.Block_Size / Extent_Header_Size - 1;