1 files changed, 2 insertions, 0 deletions
diff --git a/src/afl-cc.c b/src/afl-cc.c
index 8af8e7b0..486f7468 100644
--- a/src/afl-cc.c
+++ b/src/afl-cc.c
@@ -1777,6 +1777,8 @@ int main(int argc, char **argv, char **envp) {
         SAYF(
             "\nLLVM/LTO/afl-clang-fast/afl-clang-lto specific environment "
             "variables:\n"
+            "  AFL_LLVM_THREADSAFE_INST: instrument with thread safe counters, "
+            "disables neverzero\n"
 
             COUNTER_BEHAVIOUR