diff --git a/src/Gui/QuantitySpinBox.cpp b/src/Gui/QuantitySpinBox.cpp
index be0e7fa70552..91d1e497df8c 100644
--- a/src/Gui/QuantitySpinBox.cpp
+++ b/src/Gui/QuantitySpinBox.cpp
@@ -132,7 +132,7 @@ class QuantitySpinBoxPrivate
                     quantity.setUnit(unit);
                     result = quantity;
 
-                    // Now translate the text into the unit system
+                    // Now translate the quantity into its string representation using the user-defined unit system
                     input = Base::UnitsApi::schemaTranslate(result);
                 }
             }