diff --git a/Packages/Number_types/changes.txt b/Packages/Number_types/changes.txt
index 43886dbb814..fec006ed2e3 100644
--- a/Packages/Number_types/changes.txt
+++ b/Packages/Number_types/changes.txt
@@ -1,3 +1,6 @@
+4.50     (24 March 02)
+- added missing creation variable in Sqrt functor doc.
+
 4.49     (21 March 02)
 - Kill lexicographical_sign.
 
diff --git a/Packages/Number_types/doc_tex/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex b/Packages/Number_types/doc_tex/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex
index 7043de80c7f..59ae03bbb8a 100644
--- a/Packages/Number_types/doc_tex/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex
+++ b/Packages/Number_types/doc_tex/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex
@@ -6,6 +6,10 @@ The function object class \ccRefName\ computes the square root of a number.
 
 \ccInclude{CGAL/number_utils.h}
 
+\ccIsModel
+\ccRefConceptPage{AdaptableFunctor}
+
+\ccCreationVariable{f}
 \ccMethod{NT operator()(const NT& ntval);}
 {returns the square root of \ccc{ntval}.}
 
diff --git a/Packages/Number_types/doc_tex/support/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex b/Packages/Number_types/doc_tex/support/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex
index 7043de80c7f..59ae03bbb8a 100644
--- a/Packages/Number_types/doc_tex/support/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex
+++ b/Packages/Number_types/doc_tex/support/NumberTypeSupport/NumberTypeSupport_ref/Sqrt_functor.tex
@@ -6,6 +6,10 @@ The function object class \ccRefName\ computes the square root of a number.
 
 \ccInclude{CGAL/number_utils.h}
 
+\ccIsModel
+\ccRefConceptPage{AdaptableFunctor}
+
+\ccCreationVariable{f}
 \ccMethod{NT operator()(const NT& ntval);}
 {returns the square root of \ccc{ntval}.}