diff --git a/docs/dev/ENVIRONMENT.md b/docs/dev/ENVIRONMENT.md
index 3221d95284..76b165f065 100644
--- a/docs/dev/ENVIRONMENT.md
+++ b/docs/dev/ENVIRONMENT.md
@@ -536,6 +536,7 @@ The code reads environment names through `getenv`, `IsEnvironmentSet`, `kibSetti
 | `ANYPS5_INPUT_CONFIG` | string | `core/libs/prx/libSceVideoOut/src/InputMapping.cpp` |  | path of the input mapping file that binds host keys and mouse to guest pad actions |
 | `ANYPS5_REQUIRE_DISPLAY` | presence | `core/libs/prx/libSceVideoOut/tests/Flip.cpp` |  | makes video-out tests fail instead of skipping when no display or Vulkan device is available |
 | `APS5_NO_PAD_INPUT` | presence | `core/libs/prx/libSceVideoOut/src/PadInput.cpp` |  | ignores keyboard and mouse input so a measurement run is not advanced by a stray press |
+| `APS5_NO_WGI` | presence | `core/libs/prx/libSceVideoOut/src/VideoOutDriver.cpp` |  | turns off SDL's Windows.Gaming.Input joystick backend at default hint priority, on Windows hosts where it faults a few seconds into every run |
 | `APS5_VIDEOOUT_TELEMETRY_DIR` | string | `core/libs/prx/libSceVideoOut/src/Telemetry.cpp` |  | directory where videoout.jsonl is appended with the pad and present telemetry lines; nothing is opened when unset or empty |
 
 ### libSceVideodec2