diff --git a/Bootloaders/CDC/BootloaderAPITable.S b/Bootloaders/CDC/BootloaderAPITable.S
index 060a7abea4a67c1aad0348550facd884cbf340c2..24b70ba63d7976982fe2f86ddfcefa1b9f4781b4 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 9d1e2fc0eb28dd3c40c345a3d78cc7f004b5c673..a0b49dd5ce9d12ac8b5cb32fcdfa37ef33506f84 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