diff --git a/tests/docker/dockerfiles/centos6.docker b/tests/docker/dockerfiles/centos6.docker
index 34e0d3b91e877efcf0b4e3c9e8ab8b2fe6fcb4dc..17a4d24d54f84c81a08468db5764e19ca1d6dbdc 100644
--- a/tests/docker/dockerfiles/centos6.docker
+++ b/tests/docker/dockerfiles/centos6.docker
@@ -1,7 +1,7 @@
 FROM centos:6
 RUN yum install -y epel-release
 ENV PACKAGES libfdt-devel ccache \
-    tar git make gcc g++ \
+    tar git make gcc g++ flex bison \
     zlib-devel glib2-devel SDL-devel pixman-devel \
     epel-release
 RUN yum install -y $PACKAGES