diff --git a/Containers/collabora/Dockerfile b/Containers/collabora/Dockerfile
index 9cdb48b6..8c1f11ed 100644
--- a/Containers/collabora/Dockerfile
+++ b/Containers/collabora/Dockerfile
@@ -9,7 +9,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 RUN set -ex; \
     \
     apt-get update; \
-    apt --fix-broken install; \
+    apt-get --fix-broken install; \
     apt-get install -y --no-install-recommends \
         netcat-openbsd \
     ; \