1 files changed, 1 insertions, 0 deletions
diff --git a/engine.h b/engine.h
index f27220c..92b8b68 100644
--- a/engine.h
+++ b/engine.h
@@ -16,3 +16,4 @@ double pressure_ratio(const Engine *e);
 Temperature comp_outlet_temperature(const Engine *e);
 Temperature manifold_temperature(const Engine *e);
 VolumeFlowRate volume_flow_rate(const Engine *e);
+MassFlowRate mass_flow_rate(const Engine *e);