diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 61b4893cc..a4e812719 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -1528,9 +1528,9 @@ void GCode::_do_export(Print& print, FILE* file)
     _write_format(file, "; total filament cost = %.1lf\n", print.m_print_statistics.total_cost);
     if (print.m_print_statistics.total_toolchanges > 0)
     	_write_format(file, "; total toolchanges = %i\n", print.m_print_statistics.total_toolchanges);
-    _write_format(file, "; estimated printing time (normal mode) = %s\n", m_normal_time_estimator.get_time_dhm/*s*/().c_str());
+    _write_format(file, "; estimated printing time (normal mode) = %s\n", m_normal_time_estimator.get_time_dhm().c_str());
     if (m_silent_time_estimator_enabled)
-        _write_format(file, "; estimated printing time (silent mode) = %s\n", m_silent_time_estimator.get_time_dhm/*s*/().c_str());
+        _write_format(file, "; estimated printing time (silent mode) = %s\n", m_silent_time_estimator.get_time_dhm().c_str());
 
     // Append full config.
     _write(file, "\n");