--- a/dom/base/nsINode.h
+++ b/dom/base/nsINode.h
@@ -51,25 +51,29 @@ class nsIPrincipal;
 class nsIURI;
 class nsNodeSupportsWeakRefTearoff;
 class nsNodeWeakReference;
 class nsDOMMutationObserver;
 
 // We declare the bare minimum infrastructure here to allow us to have a
 // UniquePtr<ServoNodeData> on nsINode.
 struct ServoNodeData;
-extern "C" void Servo_NodeData_Drop(ServoNodeData*);
+/**
+ * NB: This function is not meant to be implemented in Servo, it's a proxy to
+ * a Servo function instead, see the comment in layout/style/ServoBindings.h.
+ */
+void Servo_NodeData_DefaultDelete(ServoNodeData*);
 namespace mozilla {
 template<>
 class DefaultDelete<ServoNodeData>
 {
 public:
   void operator()(ServoNodeData* aPtr) const
   {
-    Servo_NodeData_Drop(aPtr);
+    Servo_NodeData_DefaultDelete(aPtr);
   }
 };
 } // namespace mozilla
 
 namespace mozilla {
 class EventListenerManager;
 namespace dom {
 /**

--- a/layout/style/ServoBindings.cpp
+++ b/layout/style/ServoBindings.cpp
@@ -43,16 +43,25 @@ using namespace mozilla::dom;
   }
 
 IMPL_STRONG_REF_TYPE_FOR(ServoComputedValues)
 IMPL_STRONG_REF_TYPE_FOR(RawServoStyleSheet)
 IMPL_STRONG_REF_TYPE_FOR(ServoDeclarationBlock)
 
 #undef IMPL_STRONG_REF_TYPE_FOR
 
+/**
+ * NB: Declared in dom/base/nsINode.h, not to be implemented from Servo.
+ */
+void
+Servo_NodeData_DefaultDelete(ServoNodeData* aServoNodeData)
+{
+  Servo_NodeData_Drop(aServoNodeData);
+}
+
 uint32_t
 Gecko_ChildrenCount(RawGeckoNodeBorrowed aNode)
 {
   return aNode->GetChildCount();
 }
 
 bool
 Gecko_NodeIsElement(RawGeckoNodeBorrowed aNode)