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-rw-r--r--README.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/README.md b/README.md
index 690451a2..04ead78e 100644
--- a/README.md
+++ b/README.md
@@ -137,7 +137,7 @@ afl++ has many build options.
 The easiest is to build and install everything:
 
 ```shell
-$ sudo apt install build-essential libtool-bin python3 automake bison libglib2.0-dev libpixman-1-dev clang python-setuptools llvm
+$ sudo apt install build-essential libtool-bin python3 automake flex bison libglib2.0-dev libpixman-1-dev clang python-setuptools llvm
 $ make distrib
 $ sudo make install
 ```