diff --git a/doc/smoothingModel_constDiffSmoothing.txt b/doc/smoothingModel_constDiffSmoothing.txt
index 34b0c3e4..99c06c58 100644
--- a/doc/smoothingModel_constDiffSmoothing.txt
+++ b/doc/smoothingModel_constDiffSmoothing.txt
@@ -18,7 +18,7 @@ constDiffSmoothingProps
     lowerLimit                        number1;
     upperLimit                        number2;
     smoothingLength                   lengthScale;
-    smoothingLengthReference          lengthScaleRefField;
+    smoothingLengthReference          lengthScaleRef;
     smoothingLengthFieldName          fieldName1;
     smoothingLengthReferenceFieldName fieldName2;
     verbose;
@@ -27,7 +27,7 @@ constDiffSmoothingProps
 {number1} = scalar fields will be bound to this lower value :ulb,l
 {number2} = scalar fields will be bound to this upper value :l
 {lengthScale} = length scale over which the exchange fields will be smoothed out :l
-{lengthScaleRefField} = (optional) length scale over which reference fields (e.g., the average particle velocity) will be smoothed out. Should be always larger than lengthScale. If not specified, will be equal to lengthScale. :l
+{lengthScaleRef} = (optional) length scale over which reference fields (e.g., the average particle velocity) will be smoothed out. Should be always larger than lengthScale. If not specified, will be equal to lengthScale. :l
 {fieldName1} = (optional) name of scalar field to be used as local smoothing length. :l
 {fieldName2} = (optional) name of scalar field to be used as local smoothing length for reference fields. :l
 
@@ -56,7 +56,7 @@ which these reference fields are not specified. Values calculated in the cells
 e.g. the average particle velocity, which are not specified in all cells in case
 the flow is rather dilute.
 
-Alternative to {smoothingLength} and {smoothingLengthReferenceField}, 
+Alternative to {smoothingLength} and {smoothingLengthReference}, 
 {smoothingLengthFieldName} and/or {smoothingLengthReferenceFieldName} can be used
 to define spatial variation of the smoothing lengths. Either the scalar or field 
 options must be used, giving both will result in errors.