diff --git a/include/cln/float.h b/include/cln/float.h
index 701811a..5032cbe 100644
--- a/include/cln/float.h
+++ b/include/cln/float.h
@@ -691,9 +691,6 @@ extern const cl_F catalanconst (float_format_t f);
 // catalanconst() liefert die Catalansche Konstante im Default-Float-Format.
 extern const cl_F catalanconst (void);
 
-//CL_REQUIRE(cl_F_catalanconst_var)
-
-
 // zeta(s) returns the Riemann zeta function at s>1.
 extern const cl_F zeta (int s, const cl_F& y);
 extern const cl_F zeta (int s, float_format_t f);
diff --git a/src/float/transcendental/cl_F_catalanconst.cc b/src/float/transcendental/cl_F_catalanconst.cc
index 72b0adf..63ff307 100644
--- a/src/float/transcendental/cl_F_catalanconst.cc
+++ b/src/float/transcendental/cl_F_catalanconst.cc
@@ -18,9 +18,9 @@ namespace cln {
 const cl_F catalanconst (const cl_F& y)
 {
 	floattypecase(y
-	,	return cl_SF_catalanconst;
-	,	return cl_FF_catalanconst;
-	,	return cl_DF_catalanconst;
+	,	return cl_SF_catalanconst();
+	,	return cl_FF_catalanconst();
+	,	return cl_DF_catalanconst();
 	,	return catalanconst(TheLfloat(y)->len);
 	);
 }
diff --git a/src/float/transcendental/cl_F_catalanconst_def.cc b/src/float/transcendental/cl_F_catalanconst_def.cc
index 5b07c25..6e45a3b 100644
--- a/src/float/transcendental/cl_F_catalanconst_def.cc
+++ b/src/float/transcendental/cl_F_catalanconst_def.cc
@@ -17,9 +17,9 @@ namespace cln {
 const cl_F catalanconst (void)
 {
 	floatformatcase(default_float_format
-	,	return cl_SF_catalanconst;
-	,	return cl_FF_catalanconst;
-	,	return cl_DF_catalanconst;
+	,	return cl_SF_catalanconst();
+	,	return cl_FF_catalanconst();
+	,	return cl_DF_catalanconst();
 	,	return catalanconst(len);
 	);
 }
diff --git a/src/float/transcendental/cl_F_catalanconst_f.cc b/src/float/transcendental/cl_F_catalanconst_f.cc
index bbdc176..c23811d 100644
--- a/src/float/transcendental/cl_F_catalanconst_f.cc
+++ b/src/float/transcendental/cl_F_catalanconst_f.cc
@@ -17,9 +17,9 @@ namespace cln {
 const cl_F catalanconst (float_format_t f)
 {
 	floatformatcase((uintC)f
-	,	return cl_SF_catalanconst;
-	,	return cl_FF_catalanconst;
-	,	return cl_DF_catalanconst;
+	,	return cl_SF_catalanconst();
+	,	return cl_FF_catalanconst();
+	,	return cl_DF_catalanconst();
 	,	return catalanconst(len);
 	);
 }
diff --git a/src/float/transcendental/cl_F_catalanconst_var.cc b/src/float/transcendental/cl_F_catalanconst_var.cc
index b4799d2..829f269 100644
--- a/src/float/transcendental/cl_F_catalanconst_var.cc
+++ b/src/float/transcendental/cl_F_catalanconst_var.cc
@@ -3,8 +3,6 @@
 // General includes.
 #include "cl_sysdep.h"
 
-CL_PROVIDE(cl_F_catalanconst_var)
-
 // Specification.
 #include "cl_F_tran.h"
 
@@ -18,20 +16,36 @@ CL_PROVIDE(cl_F_catalanconst_var)
 
 namespace cln {
 
-// Mantisse der Catalanschen Konstante :
-  static const uintD catalanconst_mantisse [64/intDsize] =
-    #include "cl_F_catalanconst_var.h"
-
-cl_LF cl_LF_catalanconst = encode_LF_array(0,0,catalanconst_mantisse,64/intDsize);
+cl_LF& cl_LF_catalanconst()
+{
+	// Mantisse der Catalanschen Konstante :
+	static const uintD catalanconst_mantisse [64/intDsize] =
+	#include "cl_F_catalanconst_var.h"
+	static cl_LF val = encode_LF_array(0,0,catalanconst_mantisse,64/intDsize);
+	return val;
+}
 
 // Problem: If someone changes free_hook, the destructor of this
 // will call the new hook, passing it some pointer obtained by the old
 // malloc_hook. ??
 
-const cl_SF cl_SF_catalanconst = cl_LF_to_SF(cl_LF_catalanconst);
-const cl_FF cl_FF_catalanconst = cl_LF_to_FF(cl_LF_catalanconst);
-const cl_DF cl_DF_catalanconst = cl_LF_to_DF(cl_LF_catalanconst);
+const cl_SF& cl_SF_catalanconst()
+{
+	static const cl_SF val = cl_LF_to_SF(cl_LF_catalanconst());
+	return val;
+}
+
+const cl_DF& cl_DF_catalanconst()
+{
+	static const cl_DF val = cl_LF_to_DF(cl_LF_catalanconst());
+	return val;
+}
+
+const cl_FF& cl_FF_catalanconst()
+{
+	static const cl_FF val = cl_LF_to_FF(cl_LF_catalanconst());
+	return val;
+}
 
 }  // namespace cln
 
-CL_PROVIDE_END(cl_F_catalanconst_var)
diff --git a/src/float/transcendental/cl_F_tran.h b/src/float/transcendental/cl_F_tran.h
index 10d7af3..0899d57 100644
--- a/src/float/transcendental/cl_F_tran.h
+++ b/src/float/transcendental/cl_F_tran.h
@@ -133,10 +133,10 @@ extern cl_LF& cl_LF_eulerconst(); // as long as it has ever been computed
 extern const cl_LF eulerconst (uintC len); // computes it even further
 
 // Catalansche Konstante.
-extern const cl_SF cl_SF_catalanconst;
-extern const cl_FF cl_FF_catalanconst;
-extern const cl_DF cl_DF_catalanconst;
-extern cl_LF cl_LF_catalanconst; // as long as it has ever been computed
+extern const cl_SF& cl_SF_catalanconst();
+extern const cl_FF& cl_FF_catalanconst();
+extern const cl_DF& cl_DF_catalanconst();
+extern cl_LF& cl_LF_catalanconst(); // as long as it has ever been computed
 extern const cl_LF catalanconst (uintC len); // computes it even further
 
 // Zeta-Funktion für s>1 ganzzahlig.
diff --git a/src/float/transcendental/cl_LF_catalanconst.cc b/src/float/transcendental/cl_LF_catalanconst.cc
index 40db8e9..9e742c2 100644
--- a/src/float/transcendental/cl_LF_catalanconst.cc
+++ b/src/float/transcendental/cl_LF_catalanconst.cc
@@ -300,13 +300,13 @@ const cl_LF compute_catalanconst (uintC len)
 
 const cl_LF catalanconst (uintC len)
 {
-	var uintC oldlen = TheLfloat(cl_LF_catalanconst)->len; // vorhandene Länge
+	var uintC oldlen = TheLfloat(cl_LF_catalanconst())->len; // vorhandene Länge
 	if (len < oldlen)
-		return shorten(cl_LF_catalanconst,len);
+		return shorten(cl_LF_catalanconst(),len);
 	if (len == oldlen)
-		return cl_LF_catalanconst;
+		return cl_LF_catalanconst();
 
-	// TheLfloat(cl_LF_catalanconst)->len um mindestens einen konstanten Faktor
+	// TheLfloat(cl_LF_catalanconst())->len um mindestens einen konstanten Faktor
 	// > 1 wachsen lassen, damit es nicht zu häufig nachberechnet wird:
 	var uintC newlen = len;
 	oldlen += floor(oldlen,2); // oldlen * 3/2
@@ -314,8 +314,8 @@ const cl_LF catalanconst (uintC len)
 		newlen = oldlen;
 
 	// gewünschte > vorhandene Länge -> muß nachberechnen:
-	cl_LF_catalanconst = compute_catalanconst(newlen);
-	return (len < newlen ? shorten(cl_LF_catalanconst,len) : cl_LF_catalanconst);
+	cl_LF_catalanconst() = compute_catalanconst(newlen);
+	return (len < newlen ? shorten(cl_LF_catalanconst(),len) : cl_LF_catalanconst());
 }
 
 }  // namespace cln