diff --git a/autocompose.py b/autocompose.py
index dcdf84b..4432648 100644
--- a/autocompose.py
+++ b/autocompose.py
@@ -32,7 +32,7 @@ def generate(cname):
     try:
         cid = [x.short_id for x in c.containers.list(all=True) if cname == x.name or x.short_id in cname][0]
     except IndexError:
-        print("That container is not available.")
+        print("That container is not available.", file=sys.stderr)
         sys.exit(1)
 
     cattrs = c.containers.get(cid).attrs