diff --git a/changelogs/diplib_next.md b/changelogs/diplib_next.md
index 9aa22911..a3437ca4 100644
--- a/changelogs/diplib_next.md
+++ b/changelogs/diplib_next.md
@@ -70,7 +70,9 @@ None, but see bugfixes to *DIPlib*.
 
 ### Bug fixes
 
-None, but see bugfixes to *DIPlib*.
+- `dip.ChainCode.Length()` had a parameter `boundaryPixels` added in *DIPlib* 3.3.0, but the Python bindings
+  did not know about its default value.
+
 (See also bugfixes to *DIPlib*.)
 
 ### Build and installation changes
diff --git a/pydip/src/measurement.cpp b/pydip/src/measurement.cpp
index 0c42a758..8d65f4f9 100644
--- a/pydip/src/measurement.cpp
+++ b/pydip/src/measurement.cpp
@@ -474,7 +474,7 @@ void init_measurement( py::module& m ) {
    chain.def_readonly( "is8connected", &dip::ChainCode::is8connected );
    chain.def( "ConvertTo8Connected", &dip::ChainCode::ConvertTo8Connected );
    chain.def( "Empty", &dip::ChainCode::Empty );
-   chain.def( "Length", &dip::ChainCode::Length );
+   chain.def( "Length", &dip::ChainCode::Length, "boundaryPixels"_a = dip::S::EXCLUDE );
    chain.def( "Feret", &dip::ChainCode::Feret, "angleStep"_a = 5.0 / 180.0 * dip::pi );
    chain.def( "BendingEnergy", &dip::ChainCode::BendingEnergy );
    chain.def( "BoundingBox", []( dip::ChainCode const& self ) {