diff --git a/tests/docker/dockerfiles/debian-tricore-cross.docker b/tests/docker/dockerfiles/debian-tricore-cross.docker
index d8df2c6117..3f6b55562c 100644
--- a/tests/docker/dockerfiles/debian-tricore-cross.docker
+++ b/tests/docker/dockerfiles/debian-tricore-cross.docker
@@ -16,6 +16,7 @@ MAINTAINER Philippe Mathieu-Daudé <f4bug@amsat.org>
 RUN apt update && \
     DEBIAN_FRONTEND=noninteractive apt install -yy eatmydata && \
     DEBIAN_FRONTEND=noninteractive eatmydata apt install -yy \
+       bison \
        bzip2 \
        ca-certificates \
        ccache \