diff --git a/contrib/linuxarm32v7.Dockerfile b/contrib/linuxarm32v7.Dockerfile
index e3064b5b3e26..fe843a51da2c 100644
--- a/contrib/linuxarm32v7.Dockerfile
+++ b/contrib/linuxarm32v7.Dockerfile
@@ -104,6 +104,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends socat inotify-t
 ENV LIGHTNINGD_DATA=/root/.lightning
 ENV LIGHTNINGD_RPC_PORT=9835
 ENV LIGHTNINGD_PORT=9735
+ENV LIGHTNINGD_NETWORK=bitcoin
 
 RUN mkdir $LIGHTNINGD_DATA && \
     touch $LIGHTNINGD_DATA/config
diff --git a/contrib/linuxarm64v8.Dockerfile b/contrib/linuxarm64v8.Dockerfile
index bb29aead50fe..4c461b688afc 100644
--- a/contrib/linuxarm64v8.Dockerfile
+++ b/contrib/linuxarm64v8.Dockerfile
@@ -103,6 +103,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends socat inotify-t
 ENV LIGHTNINGD_DATA=/root/.lightning
 ENV LIGHTNINGD_RPC_PORT=9835
 ENV LIGHTNINGD_PORT=9735
+ENV LIGHTNINGD_NETWORK=bitcoin
 
 RUN mkdir $LIGHTNINGD_DATA && \
     touch $LIGHTNINGD_DATA/config