diff --git a/keyboards/aeboards/constellation/rev2/rules.mk b/keyboards/aeboards/constellation/rev2/rules.mk
index c79b49dbf94..4715678930b 100755
--- a/keyboards/aeboards/constellation/rev2/rules.mk
+++ b/keyboards/aeboards/constellation/rev2/rules.mk
@@ -1,5 +1,8 @@
 # MCU name
-MCU = STM32L433
+MCU = STM32L422
+
+# Bootloader selection
+BOOTLOADER = stm32-dfu
 
 # Build Options
 #   change yes to no to disable
diff --git a/keyboards/xelus/pachi/rgb/rules.mk b/keyboards/xelus/pachi/rgb/rules.mk
index 42e9d3feb0f..6c1b3298c45 100644
--- a/keyboards/xelus/pachi/rgb/rules.mk
+++ b/keyboards/xelus/pachi/rgb/rules.mk
@@ -1,5 +1,8 @@
 # MCU name
-MCU = STM32L433
+MCU = STM32L422
+
+# Bootloader selection
+BOOTLOADER = stm32-dfu
 
 # Build Options
 #   change yes to no to disable