diff --git a/Bootloaders/CDC/BootloaderCDC.c b/Bootloaders/CDC/BootloaderCDC.c
index dcfa978e365eb20e3fa44e486251116ca98d689b..af778c76f3c4fa46a74cefb13cc0b84b187cd059 100644
--- a/Bootloaders/CDC/BootloaderCDC.c
+++ b/Bootloaders/CDC/BootloaderCDC.c
@@ -61,7 +61,7 @@ static bool RunBootloader = true;
  *  low when the application attempts to start via a watchdog reset, the bootloader will re-start. If set to the value
  *  \ref MAGIC_BOOT_KEY the special init function \ref Application_Jump_Check() will force the application to start.
  */
-uint32_t MagicBootKey ATTR_NO_INIT;
+uint16_t MagicBootKey ATTR_NO_INIT;
 
 
 /** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
diff --git a/Bootloaders/CDC/BootloaderCDC.h b/Bootloaders/CDC/BootloaderCDC.h
index 36af96216297cf908e51987c6551e29e2b8a302b..d8c9c1c423b84addbd9c784c033c8bf344807660 100644
--- a/Bootloaders/CDC/BootloaderCDC.h
+++ b/Bootloaders/CDC/BootloaderCDC.h
@@ -69,7 +69,7 @@
 		#define SOFTWARE_IDENTIFIER          "LUFACDC"
 
 		/** Magic bootloader key to unlock forced application start mode. */
-		#define MAGIC_BOOT_KEY            0xDC42CACA
+		#define MAGIC_BOOT_KEY               0xDC42
 		
 	/* Type Defines: */
 		/** Type define for a non-returning pointer to the start of the loaded application in flash memory. */
diff --git a/Bootloaders/DFU/BootloaderDFU.c b/Bootloaders/DFU/BootloaderDFU.c
index 64850e3bb8c629daf5858a49915afafd216f8e19..fcacf76cb5f27fdfef83ba9df85818952fbd9e71 100644
--- a/Bootloaders/DFU/BootloaderDFU.c
+++ b/Bootloaders/DFU/BootloaderDFU.c
@@ -97,7 +97,7 @@ static uint16_t EndAddr = 0x0000;
  *  low when the application attempts to start via a watchdog reset, the bootloader will re-start. If set to the value
  *  \ref MAGIC_BOOT_KEY the special init function \ref Application_Jump_Check() will force the application to start.
  */
-uint32_t MagicBootKey ATTR_NO_INIT;
+uint16_t MagicBootKey ATTR_NO_INIT;
 
 
 /** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
diff --git a/Bootloaders/DFU/BootloaderDFU.h b/Bootloaders/DFU/BootloaderDFU.h
index ffd330d7fa88da450641f531071030809378809a..8a826f536c31a516c8147b02e57826b4821d3d4c 100644
--- a/Bootloaders/DFU/BootloaderDFU.h
+++ b/Bootloaders/DFU/BootloaderDFU.h
@@ -62,7 +62,7 @@
 		#define BOOTLOADER_VERSION_REV   0
 		
 		/** Magic bootloader key to unlock forced application start mode. */
-		#define MAGIC_BOOT_KEY            0xDC42CACA
+		#define MAGIC_BOOT_KEY            0xDC42
 
 		/** Complete bootloader version number expressed as a packed byte, constructed from the
 		 *  two individual bootloader version macros.
diff --git a/Bootloaders/HID/BootloaderHID.c b/Bootloaders/HID/BootloaderHID.c
index acc351a3029529e87f567f55b4c33ed6876bf919..c32dddc1537bdd3ee47f69a91ed82b4a1be7b102 100644
--- a/Bootloaders/HID/BootloaderHID.c
+++ b/Bootloaders/HID/BootloaderHID.c
@@ -46,7 +46,7 @@ static bool RunBootloader = true;
  *  low when the application attempts to start via a watchdog reset, the bootloader will re-start. If set to the value
  *  \ref MAGIC_BOOT_KEY the special init function \ref Application_Jump_Check() will force the application to start.
  */
-uint32_t MagicBootKey ATTR_NO_INIT;
+uint16_t MagicBootKey ATTR_NO_INIT;
 
 
 /** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
diff --git a/Bootloaders/HID/BootloaderHID.h b/Bootloaders/HID/BootloaderHID.h
index af2812a7d6966e7ede6a19f0ae1b4a6637c5c3ea..a28163380d6e299867ae4f11bb6135f3d799383a 100644
--- a/Bootloaders/HID/BootloaderHID.h
+++ b/Bootloaders/HID/BootloaderHID.h
@@ -53,7 +53,7 @@
 		#define COMMAND_STARTAPPLICATION   0xFFFF
 
 		/** Magic bootloader key to unlock forced application start mode. */
-		#define MAGIC_BOOT_KEY            0xDC42CACA
+		#define MAGIC_BOOT_KEY             0xDC42
 		
 	/* Function Prototypes: */
 		static void SetupHardware(void);