--- a/layout/style/ServoBindings.toml
+++ b/layout/style/ServoBindings.toml
@@ -227,16 +227,17 @@ whitelist-types = [
     "nsStyleImage",
     "nsStyleImageLayers",
     "nsStyleList",
     "nsStyleMargin",
     "nsStyleOutline",
     "nsStylePadding",
     "nsStylePosition",
     "nsStyleSVG",
+    "nsStyleSVGOpacitySource",
     "nsStyleSVGPaint",
     "nsStyleSVGReset",
     "nsStyleTable",
     "nsStyleTableBorder",
     "nsStyleText",
     "nsStyleTextReset",
     "nsStyleUIReset",
     "nsStyleUnion",
@@ -453,16 +454,17 @@ structs-types = [
     "nsStyleImageRequest",
     "nsStyleList",
     "nsStyleMargin",
     "nsStyleOutline",
     "nsStylePadding",
     "nsStylePosition",
     "nsStyleQuoteValues",
     "nsStyleSVG",
+    "nsStyleSVGOpacitySource",
     "nsStyleSVGPaint",
     "nsStyleSVGReset",
     "nsStyleTable",
     "nsStyleTableBorder",
     "nsStyleText",
     "nsStyleTextReset",
     "nsStyleUIReset",
     "nsStyleUnion",