diff --git a/tools/aconfig/src/main.rs b/tools/aconfig/src/main.rs
index 6c4e2416a1..7d719f0c4d 100644
--- a/tools/aconfig/src/main.rs
+++ b/tools/aconfig/src/main.rs
@@ -135,7 +135,7 @@ fn cli() -> Command {
                         .required(true)
                         .help("The target container for the generated storage file."),
                 )
-                .arg(Arg::new("cache").long("cache").required(true))
+                .arg(Arg::new("cache").long("cache").action(ArgAction::Append).required(true))
                 .arg(Arg::new("out").long("out").required(true)),
         )
 }