diff --git a/src/PIL/DdsImagePlugin.py b/src/PIL/DdsImagePlugin.py
index 86cbe4c42..fc199ef7b 100644
--- a/src/PIL/DdsImagePlugin.py
+++ b/src/PIL/DdsImagePlugin.py
@@ -11,6 +11,7 @@ Full text of the CC0 license:
 """
 import io
 import struct
+import sys
 from enum import IntEnum, IntFlag
 
 from . import Image, ImageFile, ImagePalette
@@ -263,62 +264,43 @@ class D3DFMT(IntEnum):
 
 
 # Backward compat layer
-DDSD_CAPS = DDSD.CAPS
-DDSD_HEIGHT = DDSD.HEIGHT
-DDSD_WIDTH = DDSD.WIDTH
-DDSD_PITCH = DDSD.PITCH
-DDSD_PIXELFORMAT = DDSD.PIXELFORMAT
-DDSD_MIPMAPCOUNT = DDSD.MIPMAPCOUNT
-DDSD_LINEARSIZE = DDSD.LINEARSIZE
-DDSD_DEPTH = DDSD.DEPTH
+module = sys.modules[__name__]
+for item in DDSD:
+    setattr(module, "DDSD_" + item.name, item.value)
+for item in DDSCAPS:
+    setattr(module, "DDSCAPS_" + item.name, item.value)
+for item in DDSCAPS2:
+    setattr(module, "DDSCAPS2_" + item.name, item.value)
+for item in DDPF:
+    setattr(module, "DDPF_" + item.name, item.value)
 
-DDSCAPS_COMPLEX = DDSCAPS.COMPLEX
-DDSCAPS_TEXTURE = DDSCAPS.TEXTURE
-DDSCAPS_MIPMAP = DDSCAPS.MIPMAP
+DDS_FOURCC = DDPF.FOURCC
+DDS_RGB = DDPF.RGB
+DDS_RGBA = DDPF.RGB | DDPF.ALPHAPIXELS
+DDS_LUMINANCE = DDPF.LUMINANCE
+DDS_LUMINANCEA = DDPF.LUMINANCE | DDPF.ALPHAPIXELS
+DDS_ALPHA = DDPF.ALPHA
+DDS_PAL8 = DDPF.PALETTEINDEXED8
 
-DDSCAPS2_CUBEMAP = DDSCAPS2.CUBEMAP
-DDSCAPS2_CUBEMAP_POSITIVEX = DDSCAPS2.CUBEMAP_POSITIVEX
-DDSCAPS2_CUBEMAP_NEGATIVEX = DDSCAPS2.CUBEMAP_NEGATIVEX
-DDSCAPS2_CUBEMAP_POSITIVEY = DDSCAPS2.CUBEMAP_POSITIVEY
-DDSCAPS2_CUBEMAP_NEGATIVEY = DDSCAPS2.CUBEMAP_NEGATIVEY
-DDSCAPS2_CUBEMAP_POSITIVEZ = DDSCAPS2.CUBEMAP_POSITIVEZ
-DDSCAPS2_CUBEMAP_NEGATIVEZ = DDSCAPS2.CUBEMAP_NEGATIVEZ
-DDSCAPS2_VOLUME = DDSCAPS2.VOLUME
+DDS_HEADER_FLAGS_TEXTURE = DDSD.CAPS | DDSD.HEIGHT | DDSD.WIDTH | DDSD.PIXELFORMAT
+DDS_HEADER_FLAGS_MIPMAP = DDSD.MIPMAPCOUNT
+DDS_HEADER_FLAGS_VOLUME = DDSD.DEPTH
+DDS_HEADER_FLAGS_PITCH = DDSD.PITCH
+DDS_HEADER_FLAGS_LINEARSIZE = DDSD.LINEARSIZE
 
-DDPF_ALPHAPIXELS = DDPF.ALPHAPIXELS
-DDPF_ALPHA = DDPF.ALPHA
-DDPF_FOURCC = DDPF.FOURCC
-DDPF_PALETTEINDEXED8 = DDPF.PALETTEINDEXED8
-DDPF_RGB = DDPF.RGB
-DDPF_LUMINANCE = DDPF.LUMINANCE
+DDS_HEIGHT = DDSD.HEIGHT
+DDS_WIDTH = DDSD.WIDTH
 
-DDS_FOURCC = DDPF_FOURCC
-DDS_RGB = DDPF_RGB
-DDS_RGBA = DDPF_RGB | DDPF_ALPHAPIXELS
-DDS_LUMINANCE = DDPF_LUMINANCE
-DDS_LUMINANCEA = DDPF_LUMINANCE | DDPF_ALPHAPIXELS
-DDS_ALPHA = DDPF_ALPHA
-DDS_PAL8 = DDPF_PALETTEINDEXED8
+DDS_SURFACE_FLAGS_TEXTURE = DDSCAPS.TEXTURE
+DDS_SURFACE_FLAGS_MIPMAP = DDSCAPS.COMPLEX | DDSCAPS.MIPMAP
+DDS_SURFACE_FLAGS_CUBEMAP = DDSCAPS.COMPLEX
 
-DDS_HEADER_FLAGS_TEXTURE = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT
-DDS_HEADER_FLAGS_MIPMAP = DDSD_MIPMAPCOUNT
-DDS_HEADER_FLAGS_VOLUME = DDSD_DEPTH
-DDS_HEADER_FLAGS_PITCH = DDSD_PITCH
-DDS_HEADER_FLAGS_LINEARSIZE = DDSD_LINEARSIZE
-
-DDS_HEIGHT = DDSD_HEIGHT
-DDS_WIDTH = DDSD_WIDTH
-
-DDS_SURFACE_FLAGS_TEXTURE = DDSCAPS_TEXTURE
-DDS_SURFACE_FLAGS_MIPMAP = DDSCAPS_COMPLEX | DDSCAPS_MIPMAP
-DDS_SURFACE_FLAGS_CUBEMAP = DDSCAPS_COMPLEX
-
-DDS_CUBEMAP_POSITIVEX = DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEX
-DDS_CUBEMAP_NEGATIVEX = DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEX
-DDS_CUBEMAP_POSITIVEY = DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEY
-DDS_CUBEMAP_NEGATIVEY = DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEY
-DDS_CUBEMAP_POSITIVEZ = DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEZ
-DDS_CUBEMAP_NEGATIVEZ = DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEZ
+DDS_CUBEMAP_POSITIVEX = DDSCAPS2.CUBEMAP | DDSCAPS2.CUBEMAP_POSITIVEX
+DDS_CUBEMAP_NEGATIVEX = DDSCAPS2.CUBEMAP | DDSCAPS2.CUBEMAP_NEGATIVEX
+DDS_CUBEMAP_POSITIVEY = DDSCAPS2.CUBEMAP | DDSCAPS2.CUBEMAP_POSITIVEY
+DDS_CUBEMAP_NEGATIVEY = DDSCAPS2.CUBEMAP | DDSCAPS2.CUBEMAP_NEGATIVEY
+DDS_CUBEMAP_POSITIVEZ = DDSCAPS2.CUBEMAP | DDSCAPS2.CUBEMAP_POSITIVEZ
+DDS_CUBEMAP_NEGATIVEZ = DDSCAPS2.CUBEMAP | DDSCAPS2.CUBEMAP_NEGATIVEZ
 
 DXT1_FOURCC = D3DFMT.DXT1
 DXT3_FOURCC = D3DFMT.DXT3
@@ -405,7 +387,7 @@ class DdsImageFile(ImageFile.ImageFile):
             else:
                 msg = f"Unsupported bitcount {bitcount} for {pfflags_}"
                 raise OSError(msg)
-        elif pfflags & DDPF_PALETTEINDEXED8:
+        elif pfflags & DDPF.PALETTEINDEXED8:
             self._mode = "P"
             self.palette = ImagePalette.raw("RGBA", self.fp.read(1024))
             self.tile = [("raw", (0, 0) + self.size, 0, "L")]