diff --git a/src/mos6502.c b/src/mos6502.c
index 512a75d..649b622 100644
--- a/src/mos6502.c
+++ b/src/mos6502.c
@@ -149,6 +149,8 @@ mos6502_create()
 
     cpu->memory = vm_segment_create(MOS6502_MEMSIZE);
 
+    cpu->last_addr = 0;
+    cpu->cycles = 0;
     cpu->PC = 0;
     cpu->A = 0;
     cpu->X = 0;