diff --git a/cspline.h b/cspline.h
index 59cbe8c52e9d7ff24a3d5a6c6f315e0e4fa10b22..8b525bd0c74f80f9716e87842a38b5ba7dcfdb72 100644
--- a/cspline.h
+++ b/cspline.h
@@ -29,7 +29,7 @@ using namespace std;
 namespace MISCMATHS { 
   class Cspline{
   public: 
-    Cspline();
+    Cspline(){}
     Cspline(ColumnVector& pnodes,ColumnVector& pvals):
       nodes(pnodes),
       vals(pvals),