diff --git a/firmware/controllers/algo/fuel/dfco.cpp b/firmware/controllers/algo/fuel/dfco.cpp
index 09254893f2..3cd0b7d226 100644
--- a/firmware/controllers/algo/fuel/dfco.cpp
+++ b/firmware/controllers/algo/fuel/dfco.cpp
@@ -1,4 +1,8 @@
-#include "pch.h"
+
+#include "engine_configuration.h"
+#include "sensor.h"
+
+#include "dfco.h"
 
 bool DfcoController::getState() const {
 	if (!engineConfiguration->coastingFuelCutEnabled) {
diff --git a/firmware/controllers/algo/fuel/dfco.h b/firmware/controllers/algo/fuel/dfco.h
index 5375f7bf59..9e9765d4a0 100644
--- a/firmware/controllers/algo/fuel/dfco.h
+++ b/firmware/controllers/algo/fuel/dfco.h
@@ -1,4 +1,10 @@
+/**
+ * @file dfco.h
+ */
+
 #pragma once
+#include "engine_module.h"
+#include "timer.h"
 
 // DFCO = deceleration fuel cut off, ie, save gas when your foot is off the pedal
 class DfcoController : public EngineModule {
diff --git a/firmware/controllers/algo/fuel/injector_model.cpp b/firmware/controllers/algo/fuel/injector_model.cpp
index 40598cc305..6a4d0c5425 100644
--- a/firmware/controllers/algo/fuel/injector_model.cpp
+++ b/firmware/controllers/algo/fuel/injector_model.cpp
@@ -4,7 +4,6 @@
 #include <rusefi/arrays.h>
 #include "engine_configuration.h"
 #include "sensor.h"
-#include "engine_module.h"
 #include "error_handling.h"
 
 #include "injector_model.h"
diff --git a/firmware/controllers/algo/fuel/injector_model.h b/firmware/controllers/algo/fuel/injector_model.h
index 9e429d2ff5..36712e2b7b 100644
--- a/firmware/controllers/algo/fuel/injector_model.h
+++ b/firmware/controllers/algo/fuel/injector_model.h
@@ -2,6 +2,7 @@
 
 #include "expected.h"
 #include "injector_model_generated.h"
+#include "engine_module.h"
 
 struct IInjectorModel : public EngineModule {
 	virtual void prepare() = 0;
diff --git a/firmware/pch/readme.md b/firmware/pch/readme.md
new file mode 100644
index 0000000000..ad869ea48c
--- /dev/null
+++ b/firmware/pch/readme.md
@@ -0,0 +1,3 @@
+This folder is about Precompiled Headers
+
+See rusefi_pch.mk
\ No newline at end of file
diff --git a/firmware/util/timer.h b/firmware/util/timer.h
index fd717529dd..7fba060194 100644
--- a/firmware/util/timer.h
+++ b/firmware/util/timer.h
@@ -1,3 +1,7 @@
+/**
+ * @file timer.h
+ */
+
 #pragma once
 
 #include "efitime.h"