diff --git a/components/style/gecko/media_queries.rs b/components/style/gecko/media_queries.rs
index 4c04d9573e5..b39e748ce2b 100644
--- a/components/style/gecko/media_queries.rs
+++ b/components/style/gecko/media_queries.rs
@@ -169,6 +169,7 @@ impl Device {
             self.document()
                 .mPresShell
                 .as_ref()?
+                ._base
                 .mPresContext
                 .mRawPtr
                 .as_ref()