diff --git a/platformio.ini b/platformio.ini
index 7828029..0e4e6c5 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -276,7 +276,7 @@ lib_ignore = WiFi101
 			WiFiEspAT
 			WiFiMulti_Generic
 			WiFiNINA_Generic
-build_flags = -std=c++17 -Os -g2 -Wunused-variable
+build_flags = -std=c++17 -Os -g2 -Wunused-variable -DCUSTOM_PERIPHERAL_PINS
 monitor_speed = 115200
 monitor_echo = yes
 upload_protocol = stlink
@@ -300,7 +300,7 @@ lib_ignore = WiFi101
 			WiFiEspAT
 			WiFiMulti_Generic
 			WiFiNINA_Generic
-build_flags = -std=c++17 -Os -g2 -Wunused-variable
+build_flags = -std=c++17 -Os -g2 -Wunused-variable -DCUSTOM_PERIPHERAL_PINS
 monitor_speed = 115200
 monitor_echo = yes
 upload_protocol = stlink