diff --git a/src/mudlib/zmachine/zmemory.py b/src/mudlib/zmachine/zmemory.py
index ade9adf..6a19266 100644
--- a/src/mudlib/zmachine/zmemory.py
+++ b/src/mudlib/zmachine/zmemory.py
@@ -5,7 +5,6 @@
 # root directory of this distribution.
 #
 
-from . import bitfield
 from .zlogging import log
 
 # This class that represents the "main memory" of the z-machine.  It's
@@ -317,9 +316,8 @@ class ZMemory:
             raise ZMemoryIllegalWrite(value)
         log(f"Write {value} to global variable {varnum}")
         actual_address = self._global_variable_start + ((varnum - 0x10) * 2)
-        bf = bitfield.BitField(value)
-        self._memory[actual_address] = bf[8:15]
-        self._memory[actual_address + 1] = bf[0:7]
+        self._memory[actual_address] = (value >> 8) & 0xFF
+        self._memory[actual_address + 1] = value & 0xFF
 
     # The 'verify' opcode and the QueztalWriter class both need to have
     # a checksum of memory generated.