diff --git a/components/script/dom/htmlscriptelement.rs b/components/script/dom/htmlscriptelement.rs
index eaafcadd7cc..eb63d524c9c 100644
--- a/components/script/dom/htmlscriptelement.rs
+++ b/components/script/dom/htmlscriptelement.rs
@@ -70,7 +70,7 @@ pub struct HTMLScriptElement {
 
     #[ignore_heap_size_of = "Defined in rust-encoding"]
     /// https://html.spec.whatwg.org/multipage/#concept-script-encoding
-    block_character_encoding: DOMRefCell<Option<EncodingRef>>,
+    block_character_encoding: Cell<Option<EncodingRef>>,
 }
 
 impl HTMLScriptElement {
@@ -85,7 +85,7 @@ impl HTMLScriptElement {
             ready_to_be_parser_executed: Cell::new(false),
             parser_document: JS::from_ref(document),
             load: DOMRefCell::new(None),
-            block_character_encoding: DOMRefCell::new(None),
+            block_character_encoding: Cell::new(None),
         }
     }
 
@@ -247,7 +247,7 @@ impl HTMLScriptElement {
         // Step 13.
         if let Some(ref charset) = element.get_attribute(&ns!(), &atom!("charset")) {
             if let Some(encodingRef) = encoding_from_whatwg_label(&charset.Value()) {
-                *self.block_character_encoding.borrow_mut() = Some(encodingRef);
+                self.block_character_encoding.set(Some(encodingRef));
             }
         }
 
@@ -394,7 +394,7 @@ impl HTMLScriptElement {
 
                 let encoding = metadata.charset
                     .and_then(|encoding| encoding_from_whatwg_label(&encoding))
-                    .or_else(|| *self.block_character_encoding.borrow())
+                    .or_else(|| self.block_character_encoding.get())
                     .unwrap_or_else(|| self.parser_document.encoding());
 
                 (DOMString::from(encoding.decode(&*bytes, DecoderTrap::Replace).unwrap()),