diff --git a/xs/src/libslic3r/GCodeWriter.cpp b/xs/src/libslic3r/GCodeWriter.cpp
index 0fe15809e..9aa7616a6 100644
--- a/xs/src/libslic3r/GCodeWriter.cpp
+++ b/xs/src/libslic3r/GCodeWriter.cpp
@@ -60,16 +60,6 @@ GCodeWriter::preamble()
         } else {
             gcode << "M82 ; use absolute distances for extrusion\n";
         }
-        if (this->config.use_volumetric_e && this->config.start_gcode.value.find("M200") == std::string::npos) {
-            for (std::map<unsigned int,Extruder>::const_iterator it = this->extruders.begin(); it != this->extruders.end(); ++it) {
-                unsigned int extruder_id = it->first;
-                gcode << "M200 D" << E_NUM(this->config.filament_diameter.get_at(extruder_id));
-                if (this->multiple_extruders || extruder_id != 0) {
-                    gcode << " T" << extruder_id;
-                }
-                gcode << " ; set filament diameter\n";
-            }
-        }
         gcode << this->reset_e(true);
     }
     
diff --git a/xs/src/libslic3r/PrintConfig.cpp b/xs/src/libslic3r/PrintConfig.cpp
index e18179cd1..6d331b4d1 100644
--- a/xs/src/libslic3r/PrintConfig.cpp
+++ b/xs/src/libslic3r/PrintConfig.cpp
@@ -947,7 +947,7 @@ PrintConfigDef::build_def() {
 
     Options["use_volumetric_e"].type = coBool;
     Options["use_volumetric_e"].label = "Use volumetric E";
-    Options["use_volumetric_e"].tooltip = "This experimental setting uses outputs the E values in cubic millimeters instead of linear millimeters. The M200 command is prepended to the generated G-code, unless it is found in the configured start G-code. This is only supported in recent Marlin.";
+    Options["use_volumetric_e"].tooltip = "This experimental setting uses outputs the E values in cubic millimeters instead of linear millimeters. If your firmware doesn't already know filament diameter(s), you can put commands like 'M200 D[filament_diameter_0] T0' in your start G-code in order to turn volumetric mode on and use the filament diameter associated to the filament selected in Slic3r. This is only supported in recent Marlin.";
     Options["use_volumetric_e"].cli = "use-volumetric-e!";
 
     Options["vibration_limit"].type = coFloat;