diff --git a/dlls/windowscodecs/proxy.c b/dlls/windowscodecs/proxy.c
index d53059e65b5..34b618e8d91 100644
--- a/dlls/windowscodecs/proxy.c
+++ b/dlls/windowscodecs/proxy.c
@@ -626,6 +626,21 @@ HRESULT WINAPI IWICStream_InitializeFromMemory_Proxy_W(IWICStream *iface,
     return IWICStream_InitializeFromMemory(iface, pbBuffer, cbBufferSize);
 }
 
+HRESULT WINAPI IWICPixelFormatInfo_GetBitsPerPixel_Proxy_W(IWICPixelFormatInfo *iface, UINT *bpp)
+{
+    return IWICPixelFormatInfo_GetBitsPerPixel(iface, bpp);
+}
+
+HRESULT WINAPI IWICPixelFormatInfo_GetChannelCount_Proxy_W(IWICPixelFormatInfo *iface, UINT *count)
+{
+    return IWICPixelFormatInfo_GetChannelCount(iface, count);
+}
+
+HRESULT WINAPI IWICPixelFormatInfo_GetChannelMask_Proxy_W(IWICPixelFormatInfo *iface, UINT channel, UINT buffer_size, BYTE *buffer, UINT *actual)
+{
+    return IWICPixelFormatInfo_GetChannelMask(iface, channel, buffer_size, buffer, actual);
+}
+
 HRESULT WINAPI WICCreateColorContext_Proxy(IWICImagingFactory *iface, IWICColorContext **ppIWICColorContext)
 {
     TRACE("%p, %p\n", iface, ppIWICColorContext);
diff --git a/dlls/windowscodecs/windowscodecs.spec b/dlls/windowscodecs/windowscodecs.spec
index 905ef835afc..ae3660c6f3b 100644
--- a/dlls/windowscodecs/windowscodecs.spec
+++ b/dlls/windowscodecs/windowscodecs.spec
@@ -99,9 +99,9 @@
 @ stdcall IWICPalette_InitializeFromBitmap_Proxy(ptr ptr long long) IWICPalette_InitializeFromBitmap_Proxy_W
 @ stdcall IWICPalette_InitializeFromPalette_Proxy(ptr ptr) IWICPalette_InitializeFromPalette_Proxy_W
 @ stdcall IWICPalette_InitializePredefined_Proxy(ptr long long) IWICPalette_InitializePredefined_Proxy_W
-@ stub IWICPixelFormatInfo_GetBitsPerPixel_Proxy
-@ stub IWICPixelFormatInfo_GetChannelCount_Proxy
-@ stub IWICPixelFormatInfo_GetChannelMask_Proxy
+@ stdcall IWICPixelFormatInfo_GetBitsPerPixel_Proxy(ptr ptr) IWICPixelFormatInfo_GetBitsPerPixel_Proxy_W
+@ stdcall IWICPixelFormatInfo_GetChannelCount_Proxy(ptr ptr) IWICPixelFormatInfo_GetChannelCount_Proxy_W
+@ stdcall IWICPixelFormatInfo_GetChannelMask_Proxy(ptr long long ptr ptr) IWICPixelFormatInfo_GetChannelMask_Proxy_W
 @ stdcall IWICStream_InitializeFromIStream_Proxy(ptr ptr) IWICStream_InitializeFromIStream_Proxy_W
 @ stdcall IWICStream_InitializeFromMemory_Proxy(ptr ptr long) IWICStream_InitializeFromMemory_Proxy_W
 @ stdcall WICConvertBitmapSource(ptr ptr ptr)