diff --git a/dlls/msctf/documentmgr.c b/dlls/msctf/documentmgr.c
index 7fd354aa1b8..3d4dbe9066b 100644
--- a/dlls/msctf/documentmgr.c
+++ b/dlls/msctf/documentmgr.c
@@ -45,6 +45,9 @@ typedef struct tagDocumentMgr {
     const ITfSourceVtbl *SourceVtbl;
     LONG refCount;
 
+    /* Aggregation */
+    ITfCompartmentMgr  *CompartmentMgr;
+
     ITfContext*  contextStack[2]; /* limit of 2 contexts */
     ITfThreadMgrEventSink* ThreadMgrSink;
 } DocumentMgr;
@@ -61,6 +64,7 @@ static void DocumentMgr_Destructor(DocumentMgr *This)
         ITfContext_Release(This->contextStack[0]);
     if (This->contextStack[1])
         ITfContext_Release(This->contextStack[1]);
+    CompartmentMgr_Destructor(This->CompartmentMgr);
     HeapFree(GetProcessHeap(),0,This);
 }
 
@@ -77,6 +81,10 @@ static HRESULT WINAPI DocumentMgr_QueryInterface(ITfDocumentMgr *iface, REFIID i
     {
         *ppvOut = &This->SourceVtbl;
     }
+    else if (IsEqualIID(iid, &IID_ITfCompartmentMgr))
+    {
+        *ppvOut = This->CompartmentMgr;
+    }
 
     if (*ppvOut)
     {
@@ -303,6 +311,8 @@ HRESULT DocumentMgr_Constructor(ITfThreadMgrEventSink *ThreadMgrSink, ITfDocumen
     This->refCount = 1;
     This->ThreadMgrSink = ThreadMgrSink;
 
+    CompartmentMgr_Constructor((IUnknown*)This, &IID_IUnknown, (IUnknown**)&This->CompartmentMgr);
+
     TRACE("returning %p\n", This);
     *ppOut = (ITfDocumentMgr*)This;
     return S_OK;