diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index c31481c6c..07a011cc6 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -7610,13 +7610,14 @@ inline void gcode_M205() {
   /**
    * M665: Set delta configurations
    *
-   *    H = diagonal rod // AC-version
+   *    H = delta height
    *    L = diagonal rod
    *    R = delta radius
    *    S = segments per second
-   *    A = Alpha (Tower 1) diagonal rod trim
-   *    B = Beta (Tower 2) diagonal rod trim
-   *    C = Gamma (Tower 3) diagonal rod trim
+   *    B = delta calibration radius
+   *    X = Alpha (Tower 1) angle trim
+   *    Y = Beta (Tower 2) angle trim
+   *    Z = Rotate A and B by this angle
    */
   inline void gcode_M665() {
     if (code_seen('H')) {
@@ -7628,11 +7629,11 @@ inline void gcode_M205() {
     if (code_seen('R')) delta_radius = code_value_linear_units();
     if (code_seen('S')) delta_segments_per_second = code_value_float();
     if (code_seen('B')) delta_calibration_radius = code_value_float();
-    if (code_seen('X')) delta_tower_angle_trim[A_AXIS] = code_value_linear_units();
-    if (code_seen('Y')) delta_tower_angle_trim[B_AXIS] = code_value_linear_units();
+    if (code_seen('X')) delta_tower_angle_trim[A_AXIS] = code_value_float();
+    if (code_seen('Y')) delta_tower_angle_trim[B_AXIS] = code_value_float();
     if (code_seen('Z')) { // rotate all 3 axis for Z = 0
-      delta_tower_angle_trim[A_AXIS] -= code_value_linear_units();
-      delta_tower_angle_trim[B_AXIS] -= code_value_linear_units();
+      delta_tower_angle_trim[A_AXIS] -= code_value_float();
+      delta_tower_angle_trim[B_AXIS] -= code_value_float();
     }
     recalc_delta_settings(delta_radius, delta_diagonal_rod);
   }