diff --git a/README.md b/README.md
index 3ac2dc86..36bc8590 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,6 @@ The following environment variables can be used for **debugging** purposes.
 - `DXVK_CUSTOM_VENDOR_ID=<ID>` Specifies a custom PCI vendor ID
 - `DXVK_CUSTOM_DEVICE_ID=<ID>` Specifies a custom PCI device ID
 - `DXVK_LOG_LEVEL=none|error|warn|info|debug` Controls message logging
-- `DXVK_FAKE_DX10_SUPPORT=1` Advertizes support for D3D10 interfaces
 - `DXVK_USE_PIPECOMPILER=1` Enable asynchronous pipeline compilation. This currently only has an effect on RADV in mesa-git.
 
 ## Troubleshooting