diff --git a/Firmware/mmu.cpp b/Firmware/mmu.cpp
index d1be76d4c..522322650 100644
--- a/Firmware/mmu.cpp
+++ b/Firmware/mmu.cpp
@@ -183,14 +183,13 @@ bool check_for_ir_sensor()
 
 static bool activate_stealth_mode()
 {
-	bool activate_stealth_mode = false;
-#ifdef SILENT_MODE_STEALTH
-	activate_stealth_mode = (eeprom_read_byte((uint8_t*)EEPROM_SILENT) == SILENT_MODE_STEALTH);
-#endif //SILENT_MODE_STEALTH
-#ifdef MMU_STEALTH_MODE
-	activate_stealth_mode = true;
-#endif //MMU_STEALTH_MODE
-	return activate_stealth_mode;
+#if defined (MMU_FORCE_STEALTH_MODE)
+	return true;
+#elif defined (SILENT_MODE_STEALTH)
+	return (eeprom_read_byte((uint8_t*)EEPROM_SILENT) == SILENT_MODE_STEALTH);
+#else
+	return false;
+#endif
 }
 
 //mmu main loop - state machine processing
diff --git a/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h
index dd836b69a..40a3a229b 100644
--- a/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h
@@ -498,7 +498,7 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-#define MMU_STEALTH_MODE
+#define MMU_FORCE_STEALTH_MODE
 #define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning
diff --git a/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h
index 9715aa7d9..e316c4f02 100644
--- a/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h
@@ -499,7 +499,7 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-#define MMU_STEALTH_MODE
+#define MMU_FORCE_STEALTH_MODE
 #define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning
diff --git a/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h
index b814d1cbb..d3badf6aa 100644
--- a/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h
@@ -498,7 +498,7 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-#define MMU_STEALTH_MODE
+#define MMU_FORCE_STEALTH_MODE
 #define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning
diff --git a/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h
index 3f38a286f..2563f848a 100644
--- a/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h
@@ -499,7 +499,7 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-#define MMU_STEALTH_MODE
+#define MMU_FORCE_STEALTH_MODE
 #define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning