diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
index 75558dffcf9..47df5dbf5cf 100644
--- a/components/style/gecko/wrapper.rs
+++ b/components/style/gecko/wrapper.rs
@@ -31,7 +31,7 @@ use gecko_bindings::bindings;
 use gecko_bindings::bindings::{Gecko_ConstructStyleChildrenIterator, Gecko_DestroyStyleChildrenIterator};
 use gecko_bindings::bindings::{Gecko_ElementState, Gecko_GetDocumentLWTheme};
 use gecko_bindings::bindings::{Gecko_GetLastChild, Gecko_GetNextStyleChild};
-use gecko_bindings::bindings::{Gecko_IsRootElement, Gecko_MatchesElement, Gecko_Namespace};
+use gecko_bindings::bindings::{Gecko_IsRootElement, Gecko_MatchesElement};
 use gecko_bindings::bindings::{Gecko_SetNodeFlags, Gecko_UnsetNodeFlags};
 use gecko_bindings::bindings::Gecko_ClassOrClassList;
 use gecko_bindings::bindings::Gecko_ElementHasAnimations;
@@ -610,6 +610,7 @@ impl<'le> GeckoElement<'le> {
         }
     }
 
+    #[inline]
     fn namespace_id(&self) -> i32 {
         self.as_node().node_info().mInner.mNamespaceID
     }
@@ -1939,7 +1940,8 @@ impl<'le> ::selectors::Element for GeckoElement<'le> {
     #[inline]
     fn get_namespace(&self) -> &WeakNamespace {
         unsafe {
-            WeakNamespace::new(Gecko_Namespace(self.0))
+            let namespace_manager = structs::nsContentUtils_sNameSpaceManager;
+            WeakNamespace::new((*namespace_manager).mURIArray[self.namespace_id() as usize].mRawPtr)
         }
     }