1 files changed, 1 insertions, 0 deletions
diff --git a/engine.h b/engine.h
index 43d5f4b..cb77a35 100644
--- a/engine.h
+++ b/engine.h
@@ -5,6 +5,7 @@ typedef struct {
 	AngularSpeed rpm;
 	Pressure map;
 	Fraction ve;
+	Fraction comp_efficiency;
 } Engine;
 
 void init_engine(Engine *e);