diff --git a/.beagle/dockerfile b/.beagle/dockerfile
index 33b67b74d831f426dbb6eb525d7768d136ac5dca..fa50a0985b2f7603d73557584d679e4a97a7dad7 100644
--- a/.beagle/dockerfile
+++ b/.beagle/dockerfile
@@ -1,3 +1,5 @@
+ARG BASE
+
 FROM ${BASE}
 
 ENV CATALINA_HOME=/home/server/tomcat/