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-rw-r--r--docs/Changelog.md3
-rw-r--r--docs/env_variables.md10
2 files changed, 10 insertions, 3 deletions
diff --git a/docs/Changelog.md b/docs/Changelog.md
index bdb2dda3..142b85b3 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -14,6 +14,9 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
   - afl-fuzz:
     - new commandline options -g/G to set min/max length of generated
       fuzz inputs
+    - reintroduced AFL_PERSISTENT and AFL_DEFER_FORKSRV to allow
+      persistent mode and manual forkserver support if these are not
+      in the target binary (e.g. are in a shared library)
   - frida_mode:
     - update to new frida release, handles now c++ throw/catch
 
diff --git a/docs/env_variables.md b/docs/env_variables.md
index f7ad4ff9..06c08f31 100644
--- a/docs/env_variables.md
+++ b/docs/env_variables.md
@@ -532,9 +532,13 @@ checks or alter some of the more exotic semantics of the tool:
   - Setting `AFL_TRY_AFFINITY` tries to attempt binding to a specific CPU core
     on Linux systems, but will not terminate if that fails.
 
-  - Outdated environment variables that are not supported anymore:
-    - `AFL_DEFER_FORKSRV`
-    - `AFL_PERSISTENT`
+  - The following environment variables are only needed if you implemented
+    your own forkserver or persistent mode, or if __AFL_LOOP or __AFL_INIT
+    are in a shared library and not the main binary:
+    - `AFL_DEFER_FORKSRV` enforces a deferred forkserver even if none was
+      detected in the target binary
+    - `AFL_PERSISTENT` enforces persistent mode even if none was detected
+      in the target binary
 
 ## 5) Settings for afl-qemu-trace