diff --git a/dlls/windowscodecs/proxy.c b/dlls/windowscodecs/proxy.c
index f6d9649331f..5d451679667 100644
--- a/dlls/windowscodecs/proxy.c
+++ b/dlls/windowscodecs/proxy.c
@@ -36,6 +36,18 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
 
+HRESULT WINAPI IWICBitmapLock_GetDataPointer_Proxy_W(IWICBitmapLock *iface,
+    UINT *pcbBufferSize, BYTE **ppbData)
+{
+    return IWICBitmapLock_GetDataPointer(iface, pcbBufferSize, ppbData);
+}
+
+HRESULT WINAPI IWICBitmapLock_GetStride_Proxy_W(IWICBitmapLock *iface,
+    UINT *pcbStride)
+{
+    return IWICBitmapLock_GetStride(iface, pcbStride);
+}
+
 HRESULT WINAPI IWICBitmapSource_GetSize_Proxy_W(IWICBitmapSource *iface,
     UINT *puiWidth, UINT *puiHeight)
 {
diff --git a/dlls/windowscodecs/windowscodecs.spec b/dlls/windowscodecs/windowscodecs.spec
index c4b8873e1c2..4c30c4322d4 100644
--- a/dlls/windowscodecs/windowscodecs.spec
+++ b/dlls/windowscodecs/windowscodecs.spec
@@ -41,8 +41,8 @@
 @ stub IWICBitmapFrameEncode_SetSize_Proxy
 @ stub IWICBitmapFrameEncode_SetThumbnail_Proxy
 @ stub IWICBitmapFrameEncode_WriteSource_Proxy
-@ stub IWICBitmapLock_GetDataPointer_STA_Proxy
-@ stub IWICBitmapLock_GetStride_Proxy
+@ stdcall IWICBitmapLock_GetDataPointer_STA_Proxy(ptr ptr ptr) IWICBitmapLock_GetDataPointer_Proxy_W
+@ stdcall IWICBitmapLock_GetStride_Proxy(ptr ptr) IWICBitmapLock_GetStride_Proxy_W
 @ stub IWICBitmapScaler_Initialize_Proxy
 @ stdcall IWICBitmapSource_CopyPalette_Proxy(ptr ptr) IWICBitmapSource_CopyPalette_Proxy_W
 @ stdcall IWICBitmapSource_CopyPixels_Proxy(ptr ptr long long ptr) IWICBitmapSource_CopyPixels_Proxy_W