diff --git a/lib/soft386/opcodes.c b/lib/soft386/opcodes.c
index 9635d003edc..d104ce78125 100644
--- a/lib/soft386/opcodes.c
+++ b/lib/soft386/opcodes.c
@@ -268,7 +268,7 @@ Soft386OpcodeHandlers[SOFT386_NUM_OPCODE_HANDLERS] =
     NULL, // Invalid
     Soft386OpcodePrefix,
     Soft386OpcodePrefix,
-    NULL, // TODO: OPCODE 0xF4 NOT SUPPORTED
+    Soft386OpcodeHalt,
     NULL, // TODO: OPCODE 0xF5 NOT SUPPORTED
     NULL, // TODO: OPCODE 0xF6 NOT SUPPORTED
     NULL, // TODO: OPCODE 0xF7 NOT SUPPORTED
diff --git a/lib/soft386/opcodes.h b/lib/soft386/opcodes.h
index d4ede999d72..a767bcd17f0 100644
--- a/lib/soft386/opcodes.h
+++ b/lib/soft386/opcodes.h
@@ -135,4 +135,12 @@ Soft386OpcodeSetDir
     UCHAR Opcode
 );
 
+BOOLEAN
+FASTCALL
+Soft386OpcodeHalt
+(
+    PSOFT386_STATE State,
+    UCHAR Opcode
+);
+
 #endif // _OPCODES_H_