diff --git a/src/libslic3r/calib.cpp b/src/libslic3r/calib.cpp
index f392af9eb77..7d279e18959 100644
--- a/src/libslic3r/calib.cpp
+++ b/src/libslic3r/calib.cpp
@@ -439,11 +439,8 @@ std::string CalibPressureAdvanceLine::generate_test(double start_pa /*= 0*/, dou
 
     m_length_long = 40 + std::min(w - 120.0, 0.0);
 
-    auto startx = (w - m_length_short * 2 - m_length_long - 20) / 2;
-    auto starty = (h - count * m_space_y) / 2;
-    if (is_delta()) {
-        CalibPressureAdvanceLine::delta_modify_start(startx, starty, count);
-    }
+    auto startx = bed_ext.min.x() + (w - m_length_short * 2 - m_length_long - 20) / 2;
+    auto starty = bed_ext.min.y() + (h - count * m_space_y) / 2;
 
     return print_pa_lines(startx, starty, start_pa, step_pa, count);
 }