diff --git a/build_keyboard.mk b/build_keyboard.mk
index a73741bb3..d225fe821 100644
--- a/build_keyboard.mk
+++ b/build_keyboard.mk
@@ -110,8 +110,28 @@ ifneq ("$(wildcard $(KEYBOARD_C_1))","")
     KEYBOARD_SRC += $(KEYBOARD_C_1)
 endif
 
-OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE)
+# Generate KEYBOARD_name_subname for all levels of the keyboard folder
+KEYBOARD_FILESAFE_1 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_1)))
+KEYBOARD_FILESAFE_2 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_2)))
+KEYBOARD_FILESAFE_3 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_3)))
+KEYBOARD_FILESAFE_4 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_4)))
+KEYBOARD_FILESAFE_5 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_5)))
 
+ifneq ("$(wildcard $(KEYBOARD_PATH_5)/)","")
+    OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_5)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_4)/)","")
+    OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_4)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_3)/)","")
+    OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_3)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_2)/)","")
+    OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_2)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_1)/)","")
+    OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_1)
+endif
 
 # Setup the define for QMK_KEYBOARD_H. This is used inside of keymaps so
 # that the same keymap may be used on multiple keyboards.