diff --git a/tests/docker-ocserv/Dockerfile-debian-unix b/tests/docker-ocserv/Dockerfile-debian-unix
index b78f725c..a44c30c6 100644
--- a/tests/docker-ocserv/Dockerfile-debian-unix
+++ b/tests/docker-ocserv/Dockerfile-debian-unix
@@ -11,6 +11,7 @@ RUN apt-get install -y libtalloc2
 RUN apt-get install -y libfreeradius-client2
 RUN apt-get install -y libkrb5-3 less
 RUN apt-get install -y less
+RUN apt-get install -y liblz4-1
 RUN sed 's/PermitRootLogin without-password/PermitRootLogin yes/g' -i /etc/ssh/sshd_config
 
 RUN echo 'root:root' |chpasswd