diff --git a/keyboards/crkbd/keymaps/rpbaptist/rules.mk b/keyboards/crkbd/keymaps/rpbaptist/rules.mk
index 36538e18b14..0eed4f997cc 100644
--- a/keyboards/crkbd/keymaps/rpbaptist/rules.mk
+++ b/keyboards/crkbd/keymaps/rpbaptist/rules.mk
@@ -1,5 +1,5 @@
 # This enables Link Time Optimization. This can save a good chunk of space (several KB for me), but the macro and function ... functions cause it to error out.
-EXTRAFLAGS        += -flto
+LINK_TIME_OPTIMIZATION_ENABLE = yes
 
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in