diff --git a/components/layout/wrapper.rs b/components/layout/wrapper.rs
index 3f40945ec7d..9e3a6be89a4 100644
--- a/components/layout/wrapper.rs
+++ b/components/layout/wrapper.rs
@@ -248,7 +248,7 @@ impl<'ln> LayoutNode<'ln> {
         self.dump_indent(0);
     }
 
-    fn dump_indent(self, indent: uint) {
+    fn dump_indent(self, indent: u32) {
         let mut s = String::new();
         for _ in range(0, indent) {
             s.push_str("  ");