diff --git a/src/CurveCreator/CurveCreator_Curve.cxx b/src/CurveCreator/CurveCreator_Curve.cxx
index e41b25892..464afe2fc 100644
--- a/src/CurveCreator/CurveCreator_Curve.cxx
+++ b/src/CurveCreator/CurveCreator_Curve.cxx
@@ -29,6 +29,7 @@
 #include <CurveCreator_Curve.hxx>
 #include <CurveCreator_Section.hxx>
 
+#include <stdio.h>
 
 //=======================================================================
 // function: Constructor