diff --git a/core/m68k/m68kops.h b/core/m68k/m68kops.h
index 4cd08f7..564a57e 100644
--- a/core/m68k/m68kops.h
+++ b/core/m68k/m68kops.h
@@ -20967,7 +20967,10 @@ static void m68k_op_stop(void)
     uint new_sr = OPER_I_16();
     CPU_STOPPED |= STOP_LEVEL_STOP;
     m68ki_set_sr(new_sr);
-    SET_CYCLES(m68ki_cpu.cycle_end - 4*MUL); 
+    if (CPU_STOPPED)
+    {
+      SET_CYCLES(m68ki_cpu.cycle_end - 4*MUL); 
+    }
     return;
   }
   m68ki_exception_privilege_violation();