diff --git a/Cargo.toml b/Cargo.toml
index 210b0c4..72ca22d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "euclid"
-version = "0.10.3"
+version = "0.10.4"
 authors = ["The Servo Project Developers"]
 description = "Geometry primitives"
 documentation = "http://doc.servo.org/euclid/"
diff --git a/src/size.rs b/src/size.rs
index 2f8979b..ff0301c 100644
--- a/src/size.rs
+++ b/src/size.rs
@@ -75,7 +75,7 @@ impl<T: Ceil, U> TypedSize2D<T, U> {
     ///
     /// This behavior is preserved for negative values (unlike the basic cast).
     pub fn ceil(&self) -> Self {
-        TypedSize2D::new(self.height.ceil(), self.width.ceil())
+        TypedSize2D::new(self.width.ceil(), self.height.ceil())
     }
 }