diff --git a/Runtime/CesiumSimplePlanarEllipsoidCurve.cs b/Runtime/CesiumSimplePlanarEllipsoidCurve.cs
index 2354aa20..a68f0aec 100644
--- a/Runtime/CesiumSimplePlanarEllipsoidCurve.cs
+++ b/Runtime/CesiumSimplePlanarEllipsoidCurve.cs
@@ -8,8 +8,8 @@
 namespace CesiumForUnity
 {
     /// <summary>
-    /// Describes an ellipsoidal curve that lies on a plane intersecting the center of the earth and 
-    /// both the source and destination points. This curve can be sampled at any point along its length.
+    /// Describes a curve that's a section of an ellipse that lies on a plane intersecting the center of the earth and 
+    /// both the source and destination points on a WGS84 ellipsoid. This curve can be sampled at any point along its length.
     /// </summary>
     [ReinteropNativeImplementation("CesiumForUnityNative::CesiumSimplePlanarEllipsoidCurveImpl", "CesiumSimplePlanarEllipsoidCurveImpl.h")]
     [IconAttribute("Packages/com.cesium.unity/Editor/Resources/Cesium-24x24.png")]
diff --git a/native~/Runtime/src/CesiumSimplePlanarEllipsoidCurveImpl.cpp b/native~/Runtime/src/CesiumSimplePlanarEllipsoidCurveImpl.cpp
index 113892d9..02c4e963 100644
--- a/native~/Runtime/src/CesiumSimplePlanarEllipsoidCurveImpl.cpp
+++ b/native~/Runtime/src/CesiumSimplePlanarEllipsoidCurveImpl.cpp
@@ -16,12 +16,12 @@ CesiumSimplePlanarEllipsoidCurveImpl::~CesiumSimplePlanarEllipsoidCurveImpl() {}
 
 bool CesiumSimplePlanarEllipsoidCurveImpl::
     CreateFromEarthCenteredEarthFixedCoordinates(
-        const DotNet::CesiumForUnity::CesiumSimplePlanarEllipsoidCurve&
-            path,
+        const DotNet::CesiumForUnity::CesiumSimplePlanarEllipsoidCurve& path,
         const DotNet::Unity::Mathematics::double3 sourceEcef,
         const DotNet::Unity::Mathematics::double3 destinationEcef) {
   std::optional<SimplePlanarEllipsoidCurve> flightPath =
       SimplePlanarEllipsoidCurve::fromEarthCenteredEarthFixedCoordinates(
+          Ellipsoid::WGS84,
           glm::dvec3(sourceEcef.x, sourceEcef.y, sourceEcef.z),
           glm::dvec3(destinationEcef.x, destinationEcef.y, destinationEcef.z));
   if (!flightPath.has_value()) {
@@ -39,6 +39,7 @@ bool CesiumSimplePlanarEllipsoidCurveImpl::CreateFromLongitudeLatitudeHeight(
     const DotNet::Unity::Mathematics::double3 destinationLlh) {
   std::optional<SimplePlanarEllipsoidCurve> flightPath =
       SimplePlanarEllipsoidCurve::fromLongitudeLatitudeHeight(
+          Ellipsoid::WGS84,
           Cartographic(sourceLlh.x, sourceLlh.y, sourceLlh.z),
           Cartographic(destinationLlh.x, destinationLlh.y, destinationLlh.z));
 
@@ -58,8 +59,7 @@ CesiumSimplePlanarEllipsoidCurveImpl::GetPosition(
     double additionalHeight) const {
   assert(this->_curve != nullptr);
 
-  glm::dvec3 result =
-      this->_curve->getPosition(percentage, additionalHeight);
+  glm::dvec3 result = this->_curve->getPosition(percentage, additionalHeight);
 
   return DotNet::Unity::Mathematics::double3::Construct(
       result.x,
diff --git a/native~/extern/cesium-native b/native~/extern/cesium-native
index f8616e6c..15ccb3cd 160000
--- a/native~/extern/cesium-native
+++ b/native~/extern/cesium-native
@@ -1 +1 @@
-Subproject commit f8616e6c654f3c85ddc1edd093e14a628dd3c4ea
+Subproject commit 15ccb3cd9e8a710af1789063a799288b5be29fac