diff --git a/src/x86/cpu.S b/src/x86/cpu.S
index 94146405..5dbfa3e3 100644
--- a/src/x86/cpu.S
+++ b/src/x86/cpu.S
@@ -1971,8 +1971,8 @@ continue:
                 addb    DebugCycleCount, %al
                 movb    %al, DebugCycleCount
                 addw    %ax, SN(cpu65_cycle_count)
-                subLQ   _XAX, SN(gc_cycles_timer_0)
-                subLQ   _XAX, SN(gc_cycles_timer_1)
+                subl    %eax, SN(gc_cycles_timer_0)
+                subl    %eax, SN(gc_cycles_timer_1)
                 subw    %ax, SN(cpu65_cycles_to_execute)
                 jle     exit_cpu65_run
 continue1:      xorLQ   _XAX, _XAX