diff --git a/CHANGES.md b/CHANGES.md
index 9748cac2d..302a8b513 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -14,6 +14,7 @@
 
 - `Cesium3DTilesetSelection::Tileset::getRootTileAvailableEvent` will now resolve even when a `Tileset` is constructed with invalid source parameters, instead of hanging indefinitely.
 - Fixed compilation error with MSVC when using custom `CesiumITwinClient::PagedList` types.
+- Fixed a "maybe uninitialized" error in `GeoJsonDocumentRasterOverlay` signaled by gcc 15.2. 
 
 ### v0.58.0 - 2026-03-02
 
diff --git a/CesiumRasterOverlays/src/GeoJsonDocumentRasterOverlay.cpp b/CesiumRasterOverlays/src/GeoJsonDocumentRasterOverlay.cpp
index d1dd04b6c..e4c673f12 100644
--- a/CesiumRasterOverlays/src/GeoJsonDocumentRasterOverlay.cpp
+++ b/CesiumRasterOverlays/src/GeoJsonDocumentRasterOverlay.cpp
@@ -407,7 +407,7 @@ void addPrimitivesToData(
     const VectorStyle& style,
     const Ellipsoid& ellipsoid) {
   std::optional<GlobeRectangle> rect;
-  double maxLineWidthPixels;
+  double maxLineWidthPixels = 0.0;
   std::visit(
       RectangleAndLineWidthFromObjectVisitor{
           rect,