diff --git a/ReactCommon/react/renderer/uimanager/UIManager.cpp b/ReactCommon/react/renderer/uimanager/UIManager.cpp
index 8455efb45ed..27172099150 100644
--- a/ReactCommon/react/renderer/uimanager/UIManager.cpp
+++ b/ReactCommon/react/renderer/uimanager/UIManager.cpp
@@ -22,6 +22,13 @@
 
 namespace facebook::react {
 
+// Explicitly define destructors here, as they to exist in order to act as a
+// "key function" for the ShadowNodeWrapper class -- this allow for RTTI to work
+// properly across dynamic library boundaries (i.e. dynamic_cast that is used by
+// isHostObject method)
+ShadowNodeWrapper::~ShadowNodeWrapper() = default;
+ShadowNodeListWrapper::~ShadowNodeListWrapper() = default;
+
 static std::unique_ptr<LeakChecker> constructLeakCheckerIfNeeded(
     RuntimeExecutor const &runtimeExecutor) {
 #ifdef REACT_NATIVE_DEBUG
diff --git a/ReactCommon/react/renderer/uimanager/primitives.h b/ReactCommon/react/renderer/uimanager/primitives.h
index 101155f91af..cc2f925a5f1 100644
--- a/ReactCommon/react/renderer/uimanager/primitives.h
+++ b/ReactCommon/react/renderer/uimanager/primitives.h
@@ -30,6 +30,11 @@ struct ShadowNodeWrapper : public jsi::HostObject {
   ShadowNodeWrapper(SharedShadowNode shadowNode)
       : shadowNode(std::move(shadowNode)) {}
 
+  // The below method needs to be implemented out-of-line in order for the class
+  // to have at least one "key function" (see
+  // https://itanium-cxx-abi.github.io/cxx-abi/abi.html#vague-vtable)
+  ~ShadowNodeWrapper() override;
+
   ShadowNode::Shared shadowNode;
 };
 
@@ -37,6 +42,11 @@ struct ShadowNodeListWrapper : public jsi::HostObject {
   ShadowNodeListWrapper(SharedShadowNodeUnsharedList shadowNodeList)
       : shadowNodeList(shadowNodeList) {}
 
+  // The below method needs to be implemented out-of-line in order for the class
+  // to have at least one "key function" (see
+  // https://itanium-cxx-abi.github.io/cxx-abi/abi.html#vague-vtable)
+  ~ShadowNodeListWrapper() override;
+
   SharedShadowNodeUnsharedList shadowNodeList;
 };