diff --git a/docs/usage/environment_variables.md b/docs/usage/environment_variables.md
index 313449a40..6cae70535 100644
--- a/docs/usage/environment_variables.md
+++ b/docs/usage/environment_variables.md
@@ -72,5 +72,7 @@ environment_variables: dict[str, Callable[[], Any]] = {
     "FD_USE_DEEP_GEMM":
     lambda: bool(int(os.getenv("FD_USE_DEEP_GEMM", "0"))),
 
+    # Whether to use Machete for wint4 dense GEMM.
+    "FD_USE_MACHETE": lambda: os.getenv("FD_USE_MACHETE", "0"),
 }
 ```
diff --git a/docs/zh/usage/environment_variables.md b/docs/zh/usage/environment_variables.md
index 74b135eae..74d0fc9dd 100644
--- a/docs/zh/usage/environment_variables.md
+++ b/docs/zh/usage/environment_variables.md
@@ -71,5 +71,8 @@ environment_variables: dict[str, Callable[[], Any]] = {
     # 是否使用DeepGemm后端的FP8 blockwise MoE.
     "FD_USE_DEEP_GEMM":
     lambda: bool(int(os.getenv("FD_USE_DEEP_GEMM", "0"))),
+
+    # 是否使用 Machete 后端的 wint4 GEMM.
+    "FD_USE_MACHETE": lambda: os.getenv("FD_USE_MACHETE", "0"),
 }
 ```