diff --git a/scripts/frank-primary.env b/scripts/frank-primary.env
index 9f9123d..b38788d 100644
--- a/scripts/frank-primary.env
+++ b/scripts/frank-primary.env
@@ -50,7 +50,7 @@ FRANK_PRIMARY_SERVED_NAME=frank-primary
 FRANK_PRIMARY_PUBLISH=7770:7770
 # Containers removed before every start: the retired R9V identity and the ad
 # hoc experiment identity (both hold the GPUs / name registrations).
-FRANK_PRIMARY_LEGACY_CONTAINERS=frank-primary-r9v qwen-fp8
+FRANK_PRIMARY_LEGACY_CONTAINERS="frank-primary-r9v qwen-fp8"
 
 # --- qualified engine shape ---------------------------------------------------
 FRANK_PRIMARY_MAXLEN=200000