For python 3.7.

diff --git a/tools/CurvePlot/src/cpp/CurvePlot.cxx b/tools/CurvePlot/src/cpp/CurvePlot.cxx
index d1a37150e29fd9cb24be5d00069e0b233ade5e2c..c39246f5a8db986e16ffa978b6a1000091f5976a 100644 (file)
--- a/tools/CurvePlot/src/cpp/CurvePlot.cxx
+++ b/tools/CurvePlot/src/cpp/CurvePlot.cxx
@@ -159,7 +159,7 @@ namespace CURVEPLOT
        if(!PyUnicode_Check(ret_py))
          throw Exception("CurvePlot::toStdString(): Unexpected returned type!");
        Py_ssize_t size;
-       char *ptr = PyUnicode_AsUTF8AndSize(ret_py, &size);
+       const char *ptr = PyUnicode_AsUTF8AndSize(ret_py, &size);
        ret_str = std::string(ptr);
     }
     return ret_str;