Index: src/qwt_transform.cpp
===================================================================
--- src/qwt_transform.cpp	(revision 2064)
+++ src/qwt_transform.cpp	(revision 2066)
@@ -14,12 +14,24 @@
 #define qExp(x) ::exp(x)
 #endif
 
+#if QT_VERSION >= 0x050400
+
 //! Smallest allowed value for logarithmic scales: 1.0e-150
+const double QwtLogTransform::LogMin = 1.0e-150;
+    
+//! Largest allowed value for logarithmic scales: 1.0e150
+const double QwtLogTransform::LogMax = 1.0e150;
+
+#else
+
+//! Smallest allowed value for logarithmic scales: 1.0e-150
 QT_STATIC_CONST_IMPL double QwtLogTransform::LogMin = 1.0e-150;
 
 //! Largest allowed value for logarithmic scales: 1.0e150
 QT_STATIC_CONST_IMPL double QwtLogTransform::LogMax = 1.0e150;
 
+#endif
+
 //! Constructor
 QwtTransform::QwtTransform()
 {
Index: src/qwt_transform.h
===================================================================
--- src/qwt_transform.h	(revision 2064)
+++ src/qwt_transform.h	(revision 2066)
@@ -107,8 +107,13 @@
 
     virtual QwtTransform *copy() const;
 
+#if QT_VERSION >= 0x050400
+    static const double LogMin;
+    static const double LogMax;
+#else
     QT_STATIC_CONST double LogMin;
     QT_STATIC_CONST double LogMax;
+#endif
 };
 
 /*!