diff --git a/firmware/controllers/algo/engine_state.txt b/firmware/controllers/algo/engine_state.txt
index e6be28fc1b..11326505df 100644
--- a/firmware/controllers/algo/engine_state.txt
+++ b/firmware/controllers/algo/engine_state.txt
@@ -2,7 +2,7 @@
 
 struct_no_prefix engine_state_s
 
-struct_no_prefix speed_density_s
+struct speed_density_s
 
 bit isTChargeAirModel