diff --git a/keyboards/keebio/iris/keymaps/via/rules.mk b/keyboards/keebio/iris/keymaps/via/rules.mk
index 1e5b9980..92f9671e 100644
--- a/keyboards/keebio/iris/keymaps/via/rules.mk
+++ b/keyboards/keebio/iris/keymaps/via/rules.mk
@@ -1 +1,2 @@
 VIA_ENABLE = yes
+LINK_TIME_OPTIMIZATION_ENABLE = yes