diff --git a/firmware/controllers/algo/advance_map.h b/firmware/controllers/algo/advance_map.h
index bfa270591d..9894831632 100644
--- a/firmware/controllers/algo/advance_map.h
+++ b/firmware/controllers/algo/advance_map.h
@@ -11,6 +11,7 @@
 
 angle_t getAdvance(int rpm, float engineLoad);
 angle_t getCylinderIgnitionTrim(size_t cylinderNumber, int rpm, float ignitionLoad);
+float getInitialAdvance(int rpm, float map, float advanceMax);
 
 angle_t getAdvanceCorrections(int rpm);
 size_t getMultiSparkCount(int rpm);