--- a/layout/style/ServoTypes.h
+++ b/layout/style/ServoTypes.h
@@ -78,16 +78,19 @@ enum class ParsingMode : uint8_t {
   // In CSS, lengths must have units, except for zero values, where the unit can
   // be omitted.
   // https://www.w3.org/TR/css3-values/#lengths
   Default = 0,
   // In SVG, a coordinate or length value without a unit identifier (e.g., "25")
   // is assumed to be in user units (px).
   // https://www.w3.org/TR/SVG/coords.html#Units
   AllowUnitlessLength = 1 << 0,
+  // In SVG, out-of-range values are not treated as an error in parsing.
+  // https://www.w3.org/TR/SVG/implnote.html#RangeClamping
+  AllowAllNumericValues = 1 << 1,
 };
 
 MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(ParsingMode)
 
 // The kind of style we're generating when requesting Servo to give us an
 // inherited style.
 enum class InheritTarget {
   // We're requesting a text style.