diff --git a/dlls/uiautomationcore/uia_main.c b/dlls/uiautomationcore/uia_main.c
index f0d8247724d..77460aa174c 100644
--- a/dlls/uiautomationcore/uia_main.c
+++ b/dlls/uiautomationcore/uia_main.c
@@ -94,6 +94,11 @@ HRESULT WINAPI UiaRaiseAutomationEvent(IRawElementProviderSimple *provider, EVEN
     return S_OK;
 }
 
+void WINAPI UiaRegisterProviderCallback(UiaProviderCallback *callback)
+{
+    FIXME("(%p): stub\n", callback);
+}
+
 HRESULT WINAPI UiaHostProviderFromHwnd(HWND hwnd, IRawElementProviderSimple **provider)
 {
     FIXME("(%p, %p): stub\n", hwnd, provider);
diff --git a/dlls/uiautomationcore/uiautomationcore.spec b/dlls/uiautomationcore/uiautomationcore.spec
index 53ef893064c..5da89c3451c 100644
--- a/dlls/uiautomationcore/uiautomationcore.spec
+++ b/dlls/uiautomationcore/uiautomationcore.spec
@@ -91,7 +91,7 @@
 #@ stub UiaRaiseNotificationEvent
 @ stub UiaRaiseStructureChangedEvent
 #@ stub UiaRaiseTextEditTextChangedEvent
-@ stub UiaRegisterProviderCallback
+@ stdcall UiaRegisterProviderCallback(ptr)
 @ stub UiaRemoveEvent
 @ stdcall UiaReturnRawElementProvider(long long long ptr)
 @ stub UiaSetFocus
diff --git a/include/uiautomationcoreapi.h b/include/uiautomationcoreapi.h
index 0acdc29e0eb..de486710158 100644
--- a/include/uiautomationcoreapi.h
+++ b/include/uiautomationcoreapi.h
@@ -52,11 +52,21 @@ enum AutomationIdentifierType
     AutomationIdentifierType_Style
 };
 
+enum ProviderType
+{
+    ProviderType_BaseHwnd,
+    ProviderType_Proxy,
+    ProviderType_NonClientArea,
+};
+
+typedef SAFEARRAY * WINAPI UiaProviderCallback(HWND hwnd,enum ProviderType providerType);
+
 HRESULT WINAPI UiaGetReservedMixedAttributeValue(IUnknown **value);
 HRESULT WINAPI UiaGetReservedNotSupportedValue(IUnknown **value);
 int WINAPI UiaLookupId(enum AutomationIdentifierType type, const GUID *guid);
 BOOL WINAPI UiaPatternRelease(HUIAPATTERNOBJECT hobj);
 HRESULT WINAPI UiaRaiseAutomationEvent(IRawElementProviderSimple *provider, EVENTID id);
+void WINAPI UiaRegisterProviderCallback(UiaProviderCallback *pCallback);
 LRESULT WINAPI UiaReturnRawElementProvider(HWND hwnd, WPARAM wParam, LPARAM lParam, IRawElementProviderSimple *elprov);
 BOOL WINAPI UiaTextRangeRelease(HUIATEXTRANGE hobj);
 HRESULT WINAPI UiaHostProviderFromHwnd(HWND hwnd, IRawElementProviderSimple **elprov);