diff --git a/components/layout/floats.rs b/components/layout/floats.rs
index e4489f4288d..9a5d1521d58 100644
--- a/components/layout/floats.rs
+++ b/components/layout/floats.rs
@@ -79,7 +79,11 @@ impl FloatList {
 
 impl fmt::Debug for FloatList {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "max_block_start={:?} floats={}", self.max_block_start, self.floats.len())
+        try!(write!(f, "max_block_start={:?} floats={}", self.max_block_start, self.floats.len()));
+        for float in self.floats.iter() {
+            try!(write!(f, " {:?}", float));
+        }
+        Ok(())
     }
 }