diff --git a/Bootloaders/CDC/BootloaderAPITable.S b/Bootloaders/CDC/BootloaderAPITable.S
index 060a7abea4..24b70ba63d 100644
--- a/Bootloaders/CDC/BootloaderAPITable.S
+++ b/Bootloaders/CDC/BootloaderAPITable.S
@@ -87,5 +87,5 @@ BootloaderAPI_JumpTable:
 BootloaderAPI_Signatures:
 
 	.long BOOT_START_ADDR ; Start address of the bootloader
-	.word 0xDFB1 ; Signature for the DFU class bootloader, V1
+	.word 0xDF00 ; Signature for the CDC class bootloader
 	.word 0xDCFB ; Signature for a LUFA class bootloader
diff --git a/Bootloaders/DFU/BootloaderAPITable.S b/Bootloaders/DFU/BootloaderAPITable.S
index 9d1e2fc0eb..a0b49dd5ce 100644
--- a/Bootloaders/DFU/BootloaderAPITable.S
+++ b/Bootloaders/DFU/BootloaderAPITable.S
@@ -87,5 +87,5 @@ BootloaderAPI_JumpTable:
 BootloaderAPI_Signatures:
 
 	.long BOOT_START_ADDR ; Start address of the bootloader
-	.word 0xDFB1 ; Signature for the DFU class bootloader, V1
+	.word 0xDF10 ; Signature for the DFU class bootloader, V1
 	.word 0xDCFB ; Signature for a LUFA class bootloader