diff --git a/firmware/controllers/engine_controller.cpp b/firmware/controllers/engine_controller.cpp
index bff707cd71..5adb5a5121 100644
--- a/firmware/controllers/engine_controller.cpp
+++ b/firmware/controllers/engine_controller.cpp
@@ -770,8 +770,9 @@ void initEngineContoller(Logging *sharedLogger DECLARE_ENGINE_PARAMETER_SUFFIX)
 #endif /* EFI_PROD_CODE */
 }
 
+// these two variables are here only to let us know how much RAM is available, also these
+// help to notice when RAM usage goes up
 static char UNUSED_RAM_SIZE[10200];
-
 static char UNUSED_CCM_SIZE[7100] CCM_OPTIONAL;
 
 /**