diff --git a/storage/ubuntu-tiger/Dockerfile b/storage/ubuntu-tiger/Dockerfile
index 0281b9ab8..9b4695b4c 100644
--- a/storage/ubuntu-tiger/Dockerfile
+++ b/storage/ubuntu-tiger/Dockerfile
@@ -5,7 +5,7 @@ LABEL       author="Aurélien Delval-Carbonne" maintainer="aurelien.delval-carbo
 # General Dependencies.
 RUN 		apt update -y \
       		&& apt install -y build-essential git g++-multilib python-is-python3 \
-  			&& apt install -y autoconf autoconf-archive automake bison clang clang-format doxygen flex ghc libboost-dev libboost-graph-dev libboost-program-options-dev libboost-system-dev libreadline-dev libtool texinfo xsltproc
+  			&& apt install -y autoconf autoconf-archive automake bison clang clang-format doxygen flex gawk ghc libboost-dev libboost-graph-dev libboost-program-options-dev libboost-system-dev libreadline-dev libtool texinfo xsltproc
 
 # Reflex.
 RUN         git clone https://github.com/Genivia/RE-flex.git && cd RE-flex/ && ./clean.sh && ./build.sh && ./allinstall.sh && cd ../