diff --git a/res/GAMES.CONF b/res/GAMES.CONF
index a1a60c249..72b37f2d5 100755
--- a/res/GAMES.CONF
+++ b/res/GAMES.CONF
@@ -147,7 +147,7 @@
 1001,MINER.2049.II=Miner 2049er II
 1001,MINGS.CHALLENGE=Ming's Challenge
 0001,MINIT.MAN
-1000,THUNDERHEAD=Mission on Thunderhead
+1004,THUNDERHEAD=Mission on Thunderhead
 0001,MONTEZUMA=Montezuma's Revenge
 0001,MOON.PATROL
 0000,MR.COOL=Mr. Cool
diff --git a/src/prelaunch/thunderhead.a b/src/prelaunch/thunderhead.a
index 4e1ad96de..2d3579fe4 100644
--- a/src/prelaunch/thunderhead.a
+++ b/src/prelaunch/thunderhead.a
@@ -16,6 +16,11 @@
 
 callback
          +LC_REBOOT
+         lda   MachineStatus
+         and   #CHEATS_ENABLED
+         beq   +
+         inc   $45FA      ; patch - don't decrease energy
++
          jsr   DisableAccelerator
          jmp   $204B