diff --git a/Marlin/src/feature/leds/printer_event_leds.cpp b/Marlin/src/feature/leds/printer_event_leds.cpp
index 58084da837..31c628c281 100644
--- a/Marlin/src/feature/leds/printer_event_leds.cpp
+++ b/Marlin/src/feature/leds/printer_event_leds.cpp
@@ -21,7 +21,7 @@
  */
 
 /**
- * printer_event_leds.cpp - LED color changing based on printer status
+ * feature/leds/printer_event_leds.cpp - LED color changing based on printer status
  */
 
 #include "../../inc/MarlinConfigPre.h"
diff --git a/Marlin/src/feature/leds/printer_event_leds.h b/Marlin/src/feature/leds/printer_event_leds.h
index 0295f9f5ac..86ec292aa3 100644
--- a/Marlin/src/feature/leds/printer_event_leds.h
+++ b/Marlin/src/feature/leds/printer_event_leds.h
@@ -22,7 +22,7 @@
 #pragma once
 
 /**
- * printer_event_leds.h - LED color changing based on printer status
+ * feature/leds/printer_event_leds.h - LED color changing based on printer status
  */
 
 #include "leds.h"
diff --git a/Marlin/src/inc/Conditionals_adv.h b/Marlin/src/inc/Conditionals_adv.h
index a057034ab6..277131289a 100644
--- a/Marlin/src/inc/Conditionals_adv.h
+++ b/Marlin/src/inc/Conditionals_adv.h
@@ -383,3 +383,8 @@
 #if ANY(AUTO_BED_LEVELING_UBL, M100_FREE_MEMORY_WATCHER, DEBUG_GCODE_PARSER, TMC_DEBUG, MARLIN_DEV_MODE)
   #define NEED_HEX_PRINT 1
 #endif
+
+// Flag whether least_squares_fit.cpp is used
+#if ANY(AUTO_BED_LEVELING_UBL, AUTO_BED_LEVELING_LINEAR, Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+  #define NEED_LSF 1
+#endif
diff --git a/Marlin/src/inc/Conditionals_post.h b/Marlin/src/inc/Conditionals_post.h
index 5534acaf2c..a93e0527bf 100644
--- a/Marlin/src/inc/Conditionals_post.h
+++ b/Marlin/src/inc/Conditionals_post.h
@@ -1955,7 +1955,7 @@
 #if PIN_EXISTS(DIGIPOTSS)
   #define HAS_DIGIPOTSS 1
 #endif
-#if  ANY_PIN(MOTOR_CURRENT_PWM_X, MOTOR_CURRENT_PWM_Y, MOTOR_CURRENT_PWM_XY, MOTOR_CURRENT_PWM_Z, MOTOR_CURRENT_PWM_E)
+#if ANY_PIN(MOTOR_CURRENT_PWM_X, MOTOR_CURRENT_PWM_Y, MOTOR_CURRENT_PWM_XY, MOTOR_CURRENT_PWM_Z, MOTOR_CURRENT_PWM_E)
   #define HAS_MOTOR_CURRENT_PWM 1
 #endif
 
diff --git a/Marlin/src/lcd/menu/menu_ubl.cpp b/Marlin/src/lcd/menu/menu_ubl.cpp
index 8a5095c88f..997130a91a 100644
--- a/Marlin/src/lcd/menu/menu_ubl.cpp
+++ b/Marlin/src/lcd/menu/menu_ubl.cpp
@@ -451,7 +451,7 @@ void ubl_map_screen() {
 
     #if IS_KINEMATIC
       // Index of the mesh point upon entry
-      const uint32_t old_pos_index = grid_index(x_plot, y_plot);
+      const int32_t old_pos_index = grid_index(x_plot, y_plot);
       // Direction from new (unconstrained) encoder value
       const int8_t step_dir = int32_t(ui.encoderPosition) < old_pos_index ? -1 : 1;
     #endif
diff --git a/Marlin/src/libs/least_squares_fit.cpp b/Marlin/src/libs/least_squares_fit.cpp
index ce3a342b92..ef6ef9e90d 100644
--- a/Marlin/src/libs/least_squares_fit.cpp
+++ b/Marlin/src/libs/least_squares_fit.cpp
@@ -34,7 +34,7 @@
 
 #include "../inc/MarlinConfig.h"
 
-#if ANY(AUTO_BED_LEVELING_UBL, AUTO_BED_LEVELING_LINEAR, Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+#if NEED_LSF
 
 #include "least_squares_fit.h"
 
@@ -67,4 +67,4 @@ int finish_incremental_LSF(struct linear_fit_data *lsf) {
   return 0;
 }
 
-#endif // AUTO_BED_LEVELING_UBL || ENABLED(AUTO_BED_LEVELING_LINEAR)
+#endif // NEED_LSF