diff --git a/common/common_plotPS_functions.cpp b/common/common_plotPS_functions.cpp
index 7f27bd5632..44e00aa6c0 100644
--- a/common/common_plotPS_functions.cpp
+++ b/common/common_plotPS_functions.cpp
@@ -19,6 +19,9 @@ extern const double hvb_widths[256];
 extern const double hvo_widths[256];
 extern const double hvbo_widths[256];
 
+const double PSLIKE_PLOTTER::postscriptTextAscent = 0.718;
+
+
 // Common routines for Postscript-like plotting engines
 
 void PSLIKE_PLOTTER::SetDefaultLineWidth( int width )
diff --git a/include/plot_common.h b/include/plot_common.h
index 7c439fb739..8c342356f3 100644
--- a/include/plot_common.h
+++ b/include/plot_common.h
@@ -533,7 +533,7 @@ protected:
     virtual void emitSetRGBColor( double r, double g, double b ) = 0;
 
     /// Height of the postscript font (from the AFM)
-    static const double postscriptTextAscent = 0.718;
+    static const double postscriptTextAscent; // = 0.718;
 
     int returnPostscriptTextWidth( const wxString& aText, int aXSize,
                                    bool aItalic, bool aBold );