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-rw-r--r--utils/optimin/README.md4
1 files changed, 3 insertions, 1 deletions
diff --git a/utils/optimin/README.md b/utils/optimin/README.md
index bea77225..3036b449 100644
--- a/utils/optimin/README.md
+++ b/utils/optimin/README.md
@@ -32,7 +32,9 @@ Color Options:
 General options:
 
   -C          - Keep crashing inputs, reject everything else
-  -Q          - Use binary-only instrumentation
+  -O          - Use binary-only instrumentation (FRIDA mode)
+  -Q          - Use binary-only instrumentation (QEMU mode)
+  -U          - Use unicorn-based instrumentation (unicorn mode)
   -f          - Include edge hit counts
   -i dir      - Input directory
   -m megs     - Memory limit for child process (default=none)