diff --git a/src/library/elements.rs b/src/library/elements.rs
index 75a43282d..d1c52ab7d 100644
--- a/src/library/elements.rs
+++ b/src/library/elements.rs
@@ -41,9 +41,9 @@ pub fn rect(_: &mut EvalContext, args: &mut Args) -> TypResult<Value> {
 
 /// `square`: A square with optional content.
 pub fn square(_: &mut EvalContext, args: &mut Args) -> TypResult<Value> {
-    let length = args.named::<Length>("length")?.map(Linear::from);
-    let width = match length {
-        Some(length) => Some(length),
+    let size = args.named::<Length>("size")?.map(Linear::from);
+    let width = match size {
+        Some(size) => Some(size),
         None => args.named("width")?,
     };
     let height = match width {
diff --git a/tests/typ/elements/square.typ b/tests/typ/elements/square.typ
index 07dce4be7..7597cb222 100644
--- a/tests/typ/elements/square.typ
+++ b/tests/typ/elements/square.typ
@@ -29,6 +29,6 @@
 ]
 
 ---
-// Length wins over width and height.
+// Size wins over width and height.
 // Error: 09-20 unexpected argument
-#square(width: 10cm, height: 20cm, length: 1cm, fill: rgb("eb5278"))
+#square(width: 10cm, height: 20cm, size: 1cm, fill: rgb("eb5278"))
diff --git a/tests/typ/layout/stack.typ b/tests/typ/layout/stack.typ
index aee66d6a3..a6e7e0016 100644
--- a/tests/typ/layout/stack.typ
+++ b/tests/typ/layout/stack.typ
@@ -28,7 +28,7 @@
 #page(width: 50pt, margins: 0pt)
 #par(spacing: 5pt)
 
-#let x = square(length: 10pt, fill: eastern)
+#let x = square(size: 10pt, fill: eastern)
 #stack(dir: rtl, spacing: 5pt, x, x, x)
 #stack(dir: ltr, x, 20%, x, 20%, x)
 #stack(dir: ltr, spacing: 5pt, x, x, 7pt, 3pt, x)