diff --git a/docs/docs/users/reference/env_variables.md b/docs/docs/users/reference/env_variables.md
index c99c51f95d0..575a9edebfa 100644
--- a/docs/docs/users/reference/env_variables.md
+++ b/docs/docs/users/reference/env_variables.md
@@ -40,6 +40,7 @@ process.
 | `FOREST_LIBP2P_METRICS_ENABLED`                                  | 1 or true                        | empty                                                      | 1                                                             | Include `libp2p` metrics in Forest's Prometheus output.                                                                                                                                                                                                                        |
 | `FOREST_F3_SIDECAR_RPC_ENDPOINT`                                 | string                           | 127.0.0.1:23456                                            | `127.0.0.1:23456`                                             | An RPC endpoint of F3 sidecar.                                                                                                                                                                                                                                                 |
 | `FOREST_F3_SIDECAR_FFI_ENABLED`                                  | 1 or true                        | hard-coded per chain                                       | 1                                                             | Whether or not to start the F3 sidecar via FFI                                                                                                                                                                                                                                 |
+| `FOREST_F3_SIDECAR_FFI_BUILD_OPT_OUT`                            | 1 or true                        | empty                                                      | 1                                                             | Opt out of building the Go F3 sidecar into the binary, [see here](#forest_f3_sidecar_ffi_build_opt_out). Only applies when building Forest                                                                                                                                     |
 | `FOREST_F3_CONSENSUS_ENABLED`                                    | 1 or true                        | hard-coded per chain                                       | 1                                                             | Whether or not to apply the F3 consensus to the node                                                                                                                                                                                                                           |
 | `FOREST_F3_FINALITY`                                             | integer                          | inherited from chain configuration                         | 900                                                           | Set the chain finality epochs in F3 manifest                                                                                                                                                                                                                                   |
 | `FOREST_F3_PERMANENT_PARTICIPATING_MINER_ADDRESSES`              | comma delimited strings          | empty                                                      | `t0100,t0101`                                                 | Set the miner addresses that participate in F3 permanently                                                                                                                                                                                                                     |