diff --git a/src/base/dimension.rs b/src/base/dimension.rs
index cf290af5..71472783 100644
--- a/src/base/dimension.rs
+++ b/src/base/dimension.rs
@@ -51,7 +51,7 @@ impl<'de> Deserialize<'de> for Dynamic {
     where
         D: Deserializer<'de>,
     {
-        usize::deserialize(deserializer).map(|x| Dynamic(x))
+        usize::deserialize(deserializer).map(|x| Dynamic::new(x))
     }
 }