diff --git a/docker/airplay1/Dockerfile b/docker/airplay1/Dockerfile
index 76b4d73b..3795352e 100644
--- a/docker/airplay1/Dockerfile
+++ b/docker/airplay1/Dockerfile
@@ -44,6 +44,8 @@ COPY --from=builder-alac /usr/local/include /usr/local/include
 WORKDIR shairport-sync
 COPY . .
 RUN git checkout "$SHAIRPORT_SYNC_BRANCH"
+RUN git submodule init
+RUN git submodule update
 RUN autoreconf -fi
 RUN ./configure \
         --with-alsa \