diff --git a/firmware/config/engines/custom_engine.cpp b/firmware/config/engines/custom_engine.cpp
index 93cad78070..7aea577f8f 100644
--- a/firmware/config/engines/custom_engine.cpp
+++ b/firmware/config/engines/custom_engine.cpp
@@ -18,6 +18,7 @@
 #include "proteus_meta.h"
 #include "hellen_meta.h"
 #include "odometer.h"
+#include "defaults.h"
 
 #if EFI_ELECTRONIC_THROTTLE_BODY
 #include "electronic_throttle.h"