diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 9d3e41287c..4c9eecb10c 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -1871,7 +1871,9 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
     // SoftFever: calib
     if (print.calib_params().mode == CalibMode::Calib_PA_Line) {
         std::string gcode;
-        gcode += m_writer.set_acceleration((unsigned int)floor(m_config.outer_wall_acceleration.value + 0.5));
+        if ((m_config.default_acceleration.value > 0 && m_config.outer_wall_acceleration.value > 0)) {
+            gcode += m_writer.set_acceleration((unsigned int)floor(m_config.outer_wall_acceleration.value + 0.5));
+        }
 
         if (m_config.default_jerk.value > 0) {
             double jerk = m_config.outer_wall_jerk.value;