diff --git a/builddefs/build_keyboard.mk b/builddefs/build_keyboard.mk
index cfec9cdebe..499e6ffc69 100644
--- a/builddefs/build_keyboard.mk
+++ b/builddefs/build_keyboard.mk
@@ -368,6 +368,10 @@ endif
 # Disable features that a keyboard doesn't support
 -include $(BUILDDEFS_PATH)/disable_features.mk
 
+ifneq ("$(CONVERTER)","")
+    -include $(CONVERTER)/post_converter.mk
+endif
+
 # Pull in post_rules.mk files from all our subfolders
 ifneq ("$(wildcard $(KEYBOARD_PATH_1)/post_rules.mk)","")
     include $(KEYBOARD_PATH_1)/post_rules.mk
diff --git a/builddefs/common_features.mk b/builddefs/common_features.mk
index 8814d8b0f9..9939e0e5df 100644
--- a/builddefs/common_features.mk
+++ b/builddefs/common_features.mk
@@ -539,11 +539,7 @@ endif
 VALID_BACKLIGHT_TYPES := pwm timer software custom
 
 BACKLIGHT_ENABLE ?= no
-ifeq ($(strip $(CONVERT_TO_PROTON_C)), yes)
-    BACKLIGHT_DRIVER ?= software
-else
-    BACKLIGHT_DRIVER ?= pwm
-endif
+BACKLIGHT_DRIVER ?= pwm
 ifeq ($(strip $(BACKLIGHT_ENABLE)), yes)
     ifeq ($(filter $(BACKLIGHT_DRIVER),$(VALID_BACKLIGHT_TYPES)),)
         $(call CATASTROPHIC_ERROR,Invalid BACKLIGHT_DRIVER,BACKLIGHT_DRIVER="$(BACKLIGHT_DRIVER)" is not a valid backlight type)
diff --git a/platforms/chibios/converters/promicro_to_proton_c/post_converter.mk b/platforms/chibios/converters/promicro_to_proton_c/post_converter.mk
new file mode 100644
index 0000000000..12651bd87c
--- /dev/null
+++ b/platforms/chibios/converters/promicro_to_proton_c/post_converter.mk
@@ -0,0 +1 @@
+BACKLIGHT_DRIVER ?= software