diff --git a/vm/cpu.c b/vm/cpu.c
index 2d47c80..2d002b6 100644
--- a/vm/cpu.c
+++ b/vm/cpu.c
@@ -31,9 +31,6 @@
 #include "syscall.h"
 #include "instr_decode.h"
 
-/* CPU flags */
-#define CPU_FLAGS_HALT (1<<0)
-
 #ifdef M16_DEBUG_INSTR
 #define debug(...) fprintf(stderr, __VA_ARGS__)
 #else