--- a/servo/components/style/gecko/conversions.rs
+++ b/servo/components/style/gecko/conversions.rs
@@ -612,17 +612,18 @@ pub mod basic_shape {
         ReferenceBox: From<StyleGeometryBox>,
     {
         fn from(other: &'a StyleShapeSource) -> Self {
             match other.mType {
                 StyleShapeSourceType::None => ShapeSource::None,
                 StyleShapeSourceType::Box => ShapeSource::Box(other.mReferenceBox.into()),
                 StyleShapeSourceType::URL => {
                     unsafe {
-                        let other_url = &(**other.__bindgen_anon_1.mURL.as_ref());
+                        let shape_image = &*other.mShapeImage.mPtr;
+                        let other_url = &(**shape_image.__bindgen_anon_1.mURLValue.as_ref());
                         let url = SpecifiedUrl::from_url_value_data(&other_url._base).unwrap();
                         ShapeSource::Url(url)
                     }
                 },
                 StyleShapeSourceType::Shape => {
                     let other_shape = unsafe { &*other.mBasicShape.mPtr };
                     let shape = other_shape.into();
                     let reference_box = if other.mReferenceBox == StyleGeometryBox::NoBox {