diff --git a/Marlin/src/feature/bedlevel/mbl/mesh_bed_leveling.h b/Marlin/src/feature/bedlevel/mbl/mesh_bed_leveling.h
index 1a8e693e8180..aa97cb57ba98 100644
--- a/Marlin/src/feature/bedlevel/mbl/mesh_bed_leveling.h
+++ b/Marlin/src/feature/bedlevel/mbl/mesh_bed_leveling.h
@@ -109,7 +109,7 @@ class mesh_bed_leveling {
   static float get_z_correction(const xy_pos_t &pos) {
     const xy_int8_t ind = cell_indexes(pos);
     const float x1 = index_to_xpos[ind.x], x2 = index_to_xpos[ind.x+1],
-                y1 = index_to_xpos[ind.y], y2 = index_to_xpos[ind.y+1],
+                y1 = index_to_ypos[ind.y], y2 = index_to_ypos[ind.y+1],
                 z1 = calc_z0(pos.x, x1, z_values[ind.x][ind.y  ], x2, z_values[ind.x+1][ind.y  ]),
                 z2 = calc_z0(pos.x, x1, z_values[ind.x][ind.y+1], x2, z_values[ind.x+1][ind.y+1]),
                 zf = calc_z0(pos.y, y1, z1, y2, z2);