diff --git a/README.md b/README.md
index 35abe051..8a0ece65 100644
--- a/README.md
+++ b/README.md
@@ -267,8 +267,7 @@ the Wine prefix. Removing the option will revert to the previous behavior.
 |                       | <tt>PROTON_LOG</tt>            | Convenience method for dumping a useful debug log to `$HOME/steam-$APPID.log`. For more thorough logging, use `user_settings.py`. |
 |                       | <tt>PROTON_DUMP_DEBUG_COMMANDS</tt> | When running a game, Proton will write some useful debug scripts for that game into `$PROTON_DEBUG_DIR/proton_$USER/`. |
 |                       | <tt>PROTON_DEBUG_DIR</tt>      | Root directory for the Proton debug scripts, `/tmp` by default. |
-| <tt>wined3d</tt>      | <tt>PROTON_USE_WINED3D</tt>    | Use OpenGL-based wined3d instead of Vulkan-based DXVK for d3d11 and d3d10. This used to be called `PROTON_USE_WINED3D11`, which is now an alias for this same option. |
-| <tt>d9vk</tt>         | <tt>PROTON_USE_D9VK</tt>       | Use Vulkan-based d9vk instead of OpenGL-based wined3d for d3d9. |
+| <tt>wined3d</tt>      | <tt>PROTON_USE_WINED3D</tt>    | Use OpenGL-based wined3d instead of Vulkan-based DXVK for d3d11, d3d10, and d3d9. |
 | <tt>nod3d11</tt>      | <tt>PROTON_NO_D3D11</tt>       | Disable <tt>d3d11.dll</tt>, for d3d11 games which can fall back to and run better with d3d9. |
 | <tt>nod3d10</tt>      | <tt>PROTON_NO_D3D10</tt>       | Disable <tt>d3d10.dll</tt> and <tt>dxgi.dll</tt>, for d3d10 games which can fall back to and run better with d3d9. |
 | <tt>noesync</tt>      | <tt>PROTON_NO_ESYNC</tt>       | Do not use eventfd-based in-process synchronization primitives. |
@@ -276,5 +275,6 @@ the Wine prefix. Removing the option will revert to the previous behavior.
 | <tt>forcelgadd</tt>   | <tt>PROTON_FORCE_LARGE_ADDRESS_AWARE</tt> | Force Wine to enable the LARGE_ADDRESS_AWARE flag for all executables. |
 | <tt>oldglstr</tt>     | <tt>PROTON_OLD_GL_STRING</tt>  | Set some driver overrides to limit the length of the GL extension string, for old games that crash on very long extension strings. |
 |                       | <tt>WINE_FULLSCREEN_INTEGER_SCALING</tt> | Enable integer scaling mode, to give sharp pixels when upscaling. |
+| <tt>d9vk</tt>         | <tt>PROTON_USE_D9VK</tt>       | **Note: Obsoleted in Proton 5.0.** In older versions, use Vulkan-based DXVK instead of OpenGL-based wined3d for d3d9. |
 
 <!-- Target:  GitHub Flavor Markdown.  To test locally:  pandoc -f markdown_github -t html README.md  -->
diff --git a/proton b/proton
index c9a676fa..3a9422a5 100755
--- a/proton
+++ b/proton
@@ -343,12 +343,8 @@ class CompatData:
                 dxvkfiles = ["dxvk_config"]
                 wined3dfiles = ["d3d11", "d3d10", "d3d10core", "d3d10_1", "d3d9"]
             else:
-                dxvkfiles = ["dxvk_config", "d3d11", "d3d10", "d3d10core", "d3d10_1"]
+                dxvkfiles = ["dxvk_config", "d3d11", "d3d10", "d3d10core", "d3d10_1", "d3d9"]
                 wined3dfiles = []
-                if "d9vk" in g_session.compat_config:
-                    dxvkfiles.append("d3d9")
-                else:
-                    wined3dfiles.append("d3d9")
 
             #if the user asked for dxvk's dxgi (dxgi=n), then copy it into place
             if "WINEDLLOVERRIDES" in os.environ and "dxgi=n" in os.environ["WINEDLLOVERRIDES"]:
@@ -451,7 +447,6 @@ class Session:
 
         if not self.check_environment("PROTON_USE_WINED3D", "wined3d"):
             self.check_environment("PROTON_USE_WINED3D11", "wined3d")
-        self.check_environment("PROTON_USE_D9VK", "d9vk")
         self.check_environment("PROTON_NO_D3D11", "nod3d11")
         self.check_environment("PROTON_NO_D3D10", "nod3d10")
         self.check_environment("PROTON_NO_ESYNC", "noesync")
diff --git a/user_settings.sample.py b/user_settings.sample.py
index feb685e5..353c5da1 100755
--- a/user_settings.sample.py
+++ b/user_settings.sample.py
@@ -21,12 +21,9 @@ user_settings = {
     #Enable DXVK's HUD
 #    "DXVK_HUD": "devinfo,fps",
 
-    #Use OpenGL-based wined3d for d3d11 and d3d10 instead of Vulkan-based DXVK
+    #Use OpenGL-based wined3d for d3d11, d3d10, and d3d9 instead of Vulkan-based DXVK
 #    "PROTON_USE_WINED3D": "1",
 
-    #Use Vulkan-based D9VK instead of OpenGL-based wined3d for d3d9.
-#    "PROTON_USE_D9VK": "1",
-
     #Disable d3d11 entirely
 #    "PROTON_NO_D3D11": "1",