diff --git a/dlls/winegstreamer/gst_private.h b/dlls/winegstreamer/gst_private.h
index 32e6555cfe3..04a2f99f154 100644
--- a/dlls/winegstreamer/gst_private.h
+++ b/dlls/winegstreamer/gst_private.h
@@ -189,7 +189,6 @@ struct wm_reader
 HRESULT WINAPI winegstreamer_create_wm_sync_reader(IUnknown *outer, void **out);
 struct wm_reader *wm_reader_from_sync_reader_inner(IUnknown *inner);
 
-HRESULT wm_reader_close(struct wm_reader *reader);
 HRESULT wm_reader_get_max_stream_size(struct wm_reader *reader, WORD stream_number, DWORD *size);
 HRESULT wm_reader_get_output_format(struct wm_reader *reader, DWORD output,
         DWORD index, IWMOutputMediaProps **props);
diff --git a/dlls/winegstreamer/wm_asyncreader.c b/dlls/winegstreamer/wm_asyncreader.c
index 48553480515..8ec782f3056 100644
--- a/dlls/winegstreamer/wm_asyncreader.c
+++ b/dlls/winegstreamer/wm_asyncreader.c
@@ -443,7 +443,7 @@ static ULONG WINAPI WMReader_Release(IWMReader *iface)
         reader->cs.DebugInfo->Spare[0] = 0;
         DeleteCriticalSection(&reader->cs);
 
-        wm_reader_close(reader->wm_reader);
+        IWMSyncReader2_Close(reader->reader);
 
         IUnknown_Release(reader->reader_inner);
         free(reader);
@@ -465,7 +465,7 @@ static HRESULT WINAPI WMReader_Open(IWMReader *iface, const WCHAR *url,
 
     if (SUCCEEDED(hr = wm_reader_open_file(reader->wm_reader, url))
             && FAILED(hr = async_reader_open(reader, callback, context)))
-        wm_reader_close(reader->wm_reader);
+        IWMSyncReader2_Close(reader->reader);
 
     LeaveCriticalSection(&reader->cs);
     return hr;
@@ -483,7 +483,7 @@ static HRESULT WINAPI WMReader_Close(IWMReader *iface)
     if (SUCCEEDED(hr = async_reader_queue_op(reader, ASYNC_OP_CLOSE, NULL)))
     {
         async_reader_close(reader);
-        hr = wm_reader_close(reader->wm_reader);
+        hr = IWMSyncReader2_Close(reader->reader);
     }
 
     LeaveCriticalSection(&reader->cs);
@@ -935,7 +935,7 @@ static HRESULT WINAPI WMReaderAdvanced2_OpenStream(IWMReaderAdvanced6 *iface,
 
     if (SUCCEEDED(hr = wm_reader_open_stream(reader->wm_reader, stream))
             && FAILED(hr = async_reader_open(reader, callback, context)))
-        wm_reader_close(reader->wm_reader);
+        IWMSyncReader2_Close(reader->reader);
 
     LeaveCriticalSection(&reader->cs);
     return hr;
diff --git a/dlls/winegstreamer/wm_reader.c b/dlls/winegstreamer/wm_reader.c
index 1229789b156..d42726c04d1 100644
--- a/dlls/winegstreamer/wm_reader.c
+++ b/dlls/winegstreamer/wm_reader.c
@@ -1549,37 +1549,6 @@ HRESULT wm_reader_open_file(struct wm_reader *reader, const WCHAR *filename)
     return hr;
 }
 
-HRESULT wm_reader_close(struct wm_reader *reader)
-{
-    EnterCriticalSection(&reader->cs);
-
-    if (!reader->wg_parser)
-    {
-        LeaveCriticalSection(&reader->cs);
-        return NS_E_INVALID_REQUEST;
-    }
-
-    wg_parser_disconnect(reader->wg_parser);
-
-    reader->read_thread_shutdown = true;
-    WaitForSingleObject(reader->read_thread, INFINITE);
-    CloseHandle(reader->read_thread);
-    reader->read_thread = NULL;
-
-    wg_parser_destroy(reader->wg_parser);
-    reader->wg_parser = NULL;
-
-    if (reader->source_stream)
-        IStream_Release(reader->source_stream);
-    reader->source_stream = NULL;
-    if (reader->file)
-        CloseHandle(reader->file);
-    reader->file = NULL;
-
-    LeaveCriticalSection(&reader->cs);
-    return S_OK;
-}
-
 static struct wm_stream *wm_reader_get_stream_by_stream_number(struct wm_reader *reader, WORD stream_number)
 {
     if (stream_number && stream_number <= reader->stream_count)
@@ -2180,7 +2149,7 @@ static ULONG WINAPI unknown_inner_Release(IUnknown *iface)
 
     if (!refcount)
     {
-        wm_reader_close(reader);
+        IWMSyncReader2_Close(&reader->IWMSyncReader2_iface);
 
         reader->cs.DebugInfo->Spare[0] = 0;
         DeleteCriticalSection(&reader->cs);
@@ -2227,7 +2196,33 @@ static HRESULT WINAPI reader_Close(IWMSyncReader2 *iface)
 
     TRACE("reader %p.\n", reader);
 
-    return wm_reader_close(reader);
+    EnterCriticalSection(&reader->cs);
+
+    if (!reader->wg_parser)
+    {
+        LeaveCriticalSection(&reader->cs);
+        return NS_E_INVALID_REQUEST;
+    }
+
+    wg_parser_disconnect(reader->wg_parser);
+
+    reader->read_thread_shutdown = true;
+    WaitForSingleObject(reader->read_thread, INFINITE);
+    CloseHandle(reader->read_thread);
+    reader->read_thread = NULL;
+
+    wg_parser_destroy(reader->wg_parser);
+    reader->wg_parser = NULL;
+
+    if (reader->source_stream)
+        IStream_Release(reader->source_stream);
+    reader->source_stream = NULL;
+    if (reader->file)
+        CloseHandle(reader->file);
+    reader->file = NULL;
+
+    LeaveCriticalSection(&reader->cs);
+    return S_OK;
 }
 
 static HRESULT WINAPI reader_GetMaxOutputSampleSize(IWMSyncReader2 *iface, DWORD output, DWORD *max)