diff --git a/dlls/d3dx11_42/d3dx11_42.spec b/dlls/d3dx11_42/d3dx11_42.spec
index 815c16202c..12d442925f 100644
--- a/dlls/d3dx11_42/d3dx11_42.spec
+++ b/dlls/d3dx11_42/d3dx11_42.spec
@@ -26,7 +26,7 @@
 @ stub D3DX11CreateTextureFromResourceA
 @ stub D3DX11CreateTextureFromResourceW
 @ stub D3DX11CreateThreadPump
-@ stub D3DX11FilterTexture
+@ stdcall D3DX11FilterTexture(ptr ptr long long) d3dx11_43.D3DX11FilterTexture
 @ stub D3DX11GetImageInfoFromFileA
 @ stub D3DX11GetImageInfoFromFileW
 @ stdcall D3DX11GetImageInfoFromMemory(ptr long ptr ptr ptr) d3dx11_43.D3DX11GetImageInfoFromMemory
diff --git a/dlls/d3dx11_43/d3dx11_43.c b/dlls/d3dx11_43/d3dx11_43.c
index 201f3fb9f3..4bf49986f5 100644
--- a/dlls/d3dx11_43/d3dx11_43.c
+++ b/dlls/d3dx11_43/d3dx11_43.c
@@ -61,6 +61,13 @@ BOOL WINAPI D3DX11CheckVersion(UINT d3dsdkversion, UINT d3dxsdkversion)
     return FALSE;
 }
 
+HRESULT WINAPI D3DX11FilterTexture(ID3D11DeviceContext *context, ID3D11Resource *texture, UINT src_level, UINT filter)
+{
+    FIXME("context %p, texture %p, src_level %u, filter %#x stub!\n", context, texture, src_level, filter);
+
+    return E_NOTIMPL;
+}
+
 HRESULT WINAPI D3DX11GetImageInfoFromMemory(const void *src_data, SIZE_T src_data_size, ID3DX11ThreadPump *pump,
         D3DX11_IMAGE_INFO *img_info, HRESULT *hresult)
 {
diff --git a/dlls/d3dx11_43/d3dx11_43.spec b/dlls/d3dx11_43/d3dx11_43.spec
index 452e513a31..a4e85afe1e 100644
--- a/dlls/d3dx11_43/d3dx11_43.spec
+++ b/dlls/d3dx11_43/d3dx11_43.spec
@@ -26,7 +26,7 @@
 @ stub D3DX11CreateTextureFromResourceA
 @ stub D3DX11CreateTextureFromResourceW
 @ stub D3DX11CreateThreadPump
-@ stub D3DX11FilterTexture
+@ stdcall D3DX11FilterTexture(ptr ptr long long)
 @ stub D3DX11GetImageInfoFromFileA
 @ stub D3DX11GetImageInfoFromFileW
 @ stdcall D3DX11GetImageInfoFromMemory(ptr long ptr ptr ptr)
diff --git a/include/d3dx11tex.h b/include/d3dx11tex.h
index 16b280a75a..584a3bd882 100644
--- a/include/d3dx11tex.h
+++ b/include/d3dx11tex.h
@@ -21,6 +21,27 @@
 #ifndef __D3DX11TEX_H__
 #define __D3DX11TEX_H__
 
+typedef enum D3DX11_FILTER_FLAG
+{
+    D3DX11_FILTER_NONE             = 0x00000001,
+    D3DX11_FILTER_POINT            = 0x00000002,
+    D3DX11_FILTER_LINEAR           = 0x00000003,
+    D3DX11_FILTER_TRIANGLE         = 0x00000004,
+    D3DX11_FILTER_BOX              = 0x00000005,
+
+    D3DX11_FILTER_MIRROR_U         = 0x00010000,
+    D3DX11_FILTER_MIRROR_V         = 0x00020000,
+    D3DX11_FILTER_MIRROR_W         = 0x00040000,
+    D3DX11_FILTER_MIRROR           = 0x00070000,
+
+    D3DX11_FILTER_DITHER           = 0x00080000,
+    D3DX11_FILTER_DITHER_DIFFUSION = 0x00100000,
+
+    D3DX11_FILTER_SRGB_IN          = 0x00200000,
+    D3DX11_FILTER_SRGB_OUT         = 0x00400000,
+    D3DX11_FILTER_SRGB             = 0x00600000,
+} D3DX11_FILTER_FLAG;
+
 typedef enum D3DX11_IMAGE_FILE_FORMAT
 {
     D3DX11_IFF_BMP         = 0,
@@ -93,6 +114,8 @@ HRESULT WINAPI D3DX11CreateShaderResourceViewFromMemory(ID3D11Device *device, co
 HRESULT WINAPI D3DX11CreateTextureFromMemory(ID3D11Device *device, const void *src_data, SIZE_T src_data_size,
         D3DX11_IMAGE_LOAD_INFO *loadinfo, ID3DX11ThreadPump *pump, ID3D11Resource **texture, HRESULT *hresult);
 
+HRESULT WINAPI D3DX11FilterTexture(ID3D11DeviceContext *context, ID3D11Resource *texture, UINT src_level, UINT filter);
+
 HRESULT WINAPI D3DX11GetImageInfoFromMemory(const void *src_data, SIZE_T src_data_size, ID3DX11ThreadPump *pump,
         D3DX11_IMAGE_INFO *img_info, HRESULT *hresult);