diff --git a/include/GModelSpectralConst.hpp b/include/GModelSpectralConst.hpp
index 527841b..418d825 100644
--- a/include/GModelSpectralConst.hpp
+++ b/include/GModelSpectralConst.hpp
@@ -56,7 +56,7 @@ public:
     // Constructors and destructors
     GModelSpectralConst(void);
     explicit GModelSpectralConst(const GXmlElement& xml);
-    explicit GModelSpectralConst(const double& norm);
+    explicit GModelSpectralConst(const double& value);
     GModelSpectralConst(const GModelSpectralConst& model);
     virtual ~GModelSpectralConst(void);
 
@@ -84,8 +84,8 @@ public:
     virtual std::string          print(void) const;
 
     // Other methods
-    double norm(void) const;
-    void   norm(const double& norm);
+    double value(void) const;
+    void   value(const double& value);
 
 protected:
     // Protected methods
@@ -113,30 +113,30 @@ std::string GModelSpectralConst::type(void) const
 
 
 /***********************************************************************//**
- * @brief Return normalization factor
+ * @brief Return model value
  *
- * @return Normalization factor (ph/cm2/s/MeV).
+ * @return Model value (ph/cm2/s/MeV).
  *
- * Returns the normalization factor.
+ * Returns the model value.
  ***************************************************************************/
 inline
-double GModelSpectralConst::norm(void) const
+double GModelSpectralConst::value(void) const
 {
     return (m_norm.value());
 }
 
 
 /***********************************************************************//**
- * @brief Set normalization factor 
+ * @brief Set model value
  *
- * @param[in] norm Normalization factor (ph/cm2/s/MeV).
+ * @param[in] value Model value (ph/cm2/s/MeV).
  *
- * Sets the normalization factor.
+ * Sets the model value.
  ***************************************************************************/
 inline
-void GModelSpectralConst::norm(const double& norm)
+void GModelSpectralConst::value(const double& value)
 {
-    m_norm.value(norm);
+    m_norm.value(value);
     return;
 }
 
diff --git a/pyext/GModelSpectralConst.i b/pyext/GModelSpectralConst.i
index 561292c..8fb4a48 100644
--- a/pyext/GModelSpectralConst.i
+++ b/pyext/GModelSpectralConst.i
@@ -40,7 +40,7 @@ public:
     // Constructors and destructors
     GModelSpectralConst(void);
     explicit GModelSpectralConst(const GXmlElement& xml);
-    explicit GModelSpectralConst(const double& norm);
+    explicit GModelSpectralConst(const double& value);
     GModelSpectralConst(const GModelSpectralConst& model);
     virtual ~GModelSpectralConst(void);
 
@@ -62,8 +62,8 @@ public:
     virtual void                 write(GXmlElement& xml) const;
 
     // Other methods
-    double norm(void) const;
-    void   norm(const double& norm);
+    double value(void) const;
+    void   value(const double& value);
 };
 
 
diff --git a/src/model/GModelSpectralConst.cpp b/src/model/GModelSpectralConst.cpp
index 3ed960a..320fd5e 100644
--- a/src/model/GModelSpectralConst.cpp
+++ b/src/model/GModelSpectralConst.cpp
@@ -98,18 +98,18 @@ GModelSpectralConst::GModelSpectralConst(const GXmlElement& xml) :
 /***********************************************************************//**
  * @brief Value constructor
  *
- * @param[in] norm Normalization factor (ph/cm2/s/MeV).
+ * @param[in] value Model value (ph/cm2/s/MeV).
  *
- * Constructs constant spectral model by setting the normalization factor.
+ * Constructs constant spectral model by setting the model value.
  ***************************************************************************/
-GModelSpectralConst::GModelSpectralConst(const double& norm) :
+GModelSpectralConst::GModelSpectralConst(const double& value) :
                      GModelSpectral()
 {
     // Initialise members
     init_members();
 
-    // Set normalization factor
-    m_norm.value(norm);
+    // Set model value
+    m_norm.value(value);
 
     // Return
     return;