diff --git a/Marlin/Marlin.h b/Marlin/Marlin.h
index 0c36168df..b1e656b67 100644
--- a/Marlin/Marlin.h
+++ b/Marlin/Marlin.h
@@ -317,10 +317,6 @@ float code_value_temp_diff();
   extern float delta_diagonal_rod_trim_tower_3;
   void calculate_delta(float cartesian[3]);
   void recalc_delta_settings(float radius, float diagonal_rod);
-  float delta_safe_distance_from_top();
-  void set_cartesian_from_steppers();
-  void forwardKinematics(float point[3]);
-  void forwardKinematics(float z1, float z2, float z3);
   #if ENABLED(AUTO_BED_LEVELING_FEATURE)
     extern int delta_grid_spacing[2];
     void adjust_delta(float cartesian[3]);
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index b8cf3f735..900f3a32c 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -487,6 +487,7 @@ static uint8_t target_extruder;
     int delta_grid_spacing[2] = { 0, 0 };
     float bed_level[AUTO_BED_LEVELING_GRID_POINTS][AUTO_BED_LEVELING_GRID_POINTS];
   #endif
+  float delta_safe_distance_from_top();
 #else
   static bool home_all_axis = true;
 #endif