diff --git a/apps/wakunode2/config.nim b/apps/wakunode2/config.nim
index 193a8db76..a0dcac443 100644
--- a/apps/wakunode2/config.nim
+++ b/apps/wakunode2/config.nim
@@ -493,7 +493,7 @@ proc validateDbUrl*(val: string): ConfResult[string] =
     return err("invalid 'db url' option format: " & val)
 
 
-let StoreMessageRetentionPolicyRegex = re"^\w+:\w$"
+let StoreMessageRetentionPolicyRegex = re"^\w+:\w+$"
 
 proc validateStoreMessageRetentionPolicy*(val: string): ConfResult[string] =
   let val = val.strip()