diff --git a/src/asm386/cpu.S b/src/asm386/cpu.S
index 91c23ca5..7990c527 100644
--- a/src/asm386/cpu.S
+++ b/src/asm386/cpu.S
@@ -1910,7 +1910,6 @@ op_STZ_abs:
 op_STZ_abs_x:
                 GetAbs_X_STx
                 DoSTZ
-                incb    DebugCycleCount         // +1 cycle on write
                 Continue
 
 /* ----------------------------------