diff --git a/Changes.txt b/Changes.txt
index 69e54fcd4..26b56fcde 100644
--- a/Changes.txt
+++ b/Changes.txt
@@ -46,7 +46,7 @@
 
   * Accelerated emulation up to ~15% (ARM).
 
-  * Added limited GameLine Master Module bankswitching support.
+  * Added limited GameLine Master Module bankswitching support.  
 
   * Added 03E0 bankswitching for Brazilian Parker Bros ROMs.
 
@@ -54,6 +54,8 @@
 
   * Added JANE bankswitching used by Coleco's Tarzan prototype
 
+  * Added ELF mapper for Mattress Monkeys.
+
   * Added BUS bankswitching support for some older demos.
 
   * Fixed broken 7800 pause key support.
diff --git a/docs/index.html b/docs/index.html
index c4b706931..bdcf1211e 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -5060,6 +5060,7 @@ Ms Pac-Man (Stella extended codes):
         <tr><td>E7 </td><td>8-16K M Network </td><td>.E7 .E78, .E78K</td></tr>
         <tr><td>EF </td><td>64K Homestar Runner </td><td>.EF </td></tr>
         <tr><td>EFSC </td><td>64K Homestar Runner + RAM</td><td>.EFS, .EFSC </td></tr>
+		<tr><td>ELF </td><td>Mattress Monkeys, ARM based</td><td>.ELF </td></tr>
         <tr><td>F0 </td><td>Dynacom Megaboy </td><td>.F0 </td></tr>
         <tr><td>F4 </td><td>32K Atari </td><td>.F4 </td></tr>
         <tr><td>F4SC </td><td>32K Atari + RAM </td><td>.F4S, .F4SC </td></tr>