diff --git a/src/pye57/e57.py b/src/pye57/e57.py
index 4c7205a..67427a7 100644
--- a/src/pye57/e57.py
+++ b/src/pye57/e57.py
@@ -103,7 +103,7 @@ def write_default_header(self):
         self.root.set("e57LibraryVersion", libe57.StringNode(imf, libe57.E57_LIBRARY_ID))
         self.root.set("coordinateMetadata", libe57.StringNode(imf, ""))
         creation_date_time = libe57.StructureNode(imf)
-        creation_date_time.set("dateTimeValue", libe57.FloatNode(imf, 0.0))
+        creation_date_time.set("dateTimeValue", libe57.FloatNode(imf, 10.0))
         creation_date_time.set("isAtomicClockReferenced", libe57.IntegerNode(imf, 0))
         self.root.set("creationDateTime", creation_date_time)
         self.root.set("data3D", libe57.VectorNode(imf, True))
diff --git a/src/pye57/libe57_wrapper.cpp b/src/pye57/libe57_wrapper.cpp
index 3ea920c..f15b5f8 100644
--- a/src/pye57/libe57_wrapper.cpp
+++ b/src/pye57/libe57_wrapper.cpp
@@ -380,7 +380,7 @@ PYBIND11_MODULE(libe57, m) {
     });
 
     py::class_<FloatNode> cls_FloatNode(m, "FloatNode");
-    cls_FloatNode.def(py::init<e57::ImageFile, double, FloatPrecision, double, double>(), "destImageFile"_a, "value"_a=0.0, "precision"_a=E57_DOUBLE, "minimum"_a=DBL_MIN, "maximum"_a=DBL_MAX);
+    cls_FloatNode.def(py::init<e57::ImageFile, double, FloatPrecision, double, double>(), "destImageFile"_a, "value"_a=0.0, "precision"_a=E57_DOUBLE, "minimum"_a=-DBL_MAX, "maximum"_a=DBL_MAX);
     cls_FloatNode.def("value", &FloatNode::value);
     cls_FloatNode.def("precision", &FloatNode::precision);
     cls_FloatNode.def("minimum", &FloatNode::minimum);