diff --git a/components/style/values/specified/length.rs b/components/style/values/specified/length.rs
index 23749d6a8b7..986badf5bdc 100644
--- a/components/style/values/specified/length.rs
+++ b/components/style/values/specified/length.rs
@@ -1085,7 +1085,7 @@ impl NoCalcLength {
     #[inline]
     pub fn to_computed_pixel_length_without_context(&self) -> Result<CSSFloat, ()> {
         match *self {
-            NoCalcLength::Absolute(len) => Ok(CSSPixelLength::new(len.to_px()).finite().px()),
+            Self::Absolute(len) => Ok(CSSPixelLength::new(len.to_px()).finite().px()),
             _ => Err(()),
         }
     }
@@ -1344,6 +1344,14 @@ impl Length {
     pub fn from_px(px_value: CSSFloat) -> Length {
         Length::NoCalc(NoCalcLength::from_px(px_value))
     }
+
+    /// Get a px value without context.
+    pub fn to_computed_pixel_length_without_context(&self) -> Result<CSSFloat, ()> {
+        match *self {
+            Self::NoCalc(ref l) => l.to_computed_pixel_length_without_context(),
+            Self::Calc(ref l) => l.to_computed_pixel_length_without_context(),
+        }
+    }
 }
 
 impl Parse for Length {