diff --git a/board/c6.yaml b/board/c6.yaml
index 8ad92e3..43e00e4 100644
--- a/board/c6.yaml
+++ b/board/c6.yaml
@@ -1,3 +1,5 @@
+substitutions:
+    LED: GPIO8
 esp32:
   board: esp32-c6-devkitc-1
   framework:
diff --git a/board/s3mb16.yaml b/board/s3mb16.yaml
index 81daa4b..dd6425e 100644
--- a/board/s3mb16.yaml
+++ b/board/s3mb16.yaml
@@ -1,3 +1,6 @@
+substitutions:
+    LED: GPIO48
+    
 esp32:
   board: esp32-s3-devkitc-1
   cpu_frequency: 240MHz