diff --git a/Firmware/Configuration_adv.h b/Firmware/Configuration_adv.h
index 5386c28151..7deff3c125 100644
--- a/Firmware/Configuration_adv.h
+++ b/Firmware/Configuration_adv.h
@@ -288,6 +288,7 @@
   #define LA_K_DEF    0        // Default K factor (Unit: mm compression per 1mm/s extruder speed)
   #define LA_K_MAX    10       // Maximum acceptable K factor (exclusive, see notes in planner.cpp:plan_buffer_line)
   #define LA_LA10_MIN LA_K_MAX // Lin. Advance 1.0 threshold value (inclusive)
+  //#define LA_FLOWADJ         // Adjust LA along with flow/M221 for uniform width
   //#define LA_NOCOMPAT        // Disable Linear Advance 1.0 compatibility
   //#define LA_LIVE_K          // Allow adjusting K in the Tune menu
   //#define LA_DEBUG           // If enabled, this will generate debug information output over USB.
diff --git a/Firmware/planner.cpp b/Firmware/planner.cpp
index a994c74fdc..4789b03361 100644
--- a/Firmware/planner.cpp
+++ b/Firmware/planner.cpp
@@ -1096,12 +1096,20 @@ Having the real displacement of the head, we can calculate the total movement le
                               && delta_mm[E_AXIS] >= 0
                               && abs(delta_mm[Z_AXIS]) < 0.5;
     if (block->use_advance_lead) {
+#ifdef LA_FLOWADJ
+        // M221/FLOW should change uniformly the extrusion thickness
+        float delta_e = (e - position_float[E_AXIS]) / extruder_multiplier[extruder];
+#else
+        // M221/FLOW only adjusts for an incorrect source diameter
+        float delta_e = (e - position_float[E_AXIS]);
+#endif
+        float delta_D = sqrt(sq(x - position_float[X_AXIS])
+                             + sq(y - position_float[Y_AXIS])
+                             + sq(z - position_float[Z_AXIS]));
+
         // all extrusion moves with LA require a compression which is proportional to the
         // extrusion_length to distance ratio (e/D)
-        e_D_ratio = ((e - position_float[E_AXIS]) / extruder_multiplier[extruder]) /
-                    sqrt(sq(x - position_float[X_AXIS])
-                         + sq(y - position_float[Y_AXIS])
-                         + sq(z - position_float[Z_AXIS]));
+        e_D_ratio = delta_e / delta_D;
 
         // Check for unusual high e_D ratio to detect if a retract move was combined with the last
         // print move due to min. steps per segment. Never execute this with advance! This assumes