diff --git a/app/gui/oven_control/define.h b/app/gui/oven_control/define.h
index 0a65f1d..f8511bd 100644
--- a/app/gui/oven_control/define.h
+++ b/app/gui/oven_control/define.h
@@ -5,13 +5,14 @@
 
 #define MAJOR_VER   2
 #define MINOR_VER   0
-#define HOTFIX_VER  4
+#define HOTFIX_VER  5
 
 // 0 for normal
 // 1 for premium
-#define MODEL_GRADE 0
+#define MODEL_GRADE 1
 
 #define ENABLE_WASH_RESUMING 0
+#define WATER_LEVEL_HACCP_STAMP 0
 
 namespace Define
 {
diff --git a/app/gui/oven_control/haccp.cpp b/app/gui/oven_control/haccp.cpp
index 4080b12..a08ee94 100644
--- a/app/gui/oven_control/haccp.cpp
+++ b/app/gui/oven_control/haccp.cpp
@@ -664,8 +664,10 @@ void check()
     if (oven->door() != lastDoor)
         stamp();
 
+#if WATER_LEVEL_HACCP_STAMP
     if (udp->waterLevel() != lastWaterLevel)
         stamp();
+#endif
 
     if (lastStampedTime.elapsed() > 30 * 1000 - 100)
         stamp();