diff --git a/rules.mk b/rules.mk
index 414e0a5..4da1893 100644
--- a/rules.mk
+++ b/rules.mk
@@ -21,3 +21,6 @@ endif
 
 # good optimizations
 LTO_ENABLE = yes
+
+# debounce per key
+DEBOUNCE_TYPE = sym_eager_pk