diff --git a/src/command/list.rs b/src/command/list.rs
index fed9ccd..fc42328 100644
--- a/src/command/list.rs
+++ b/src/command/list.rs
@@ -11,10 +11,7 @@ impl ListCommand {
 
     pub fn build(self) -> super::Command {
         let uuids = self.uuids.unwrap_or(false);
-        let mut s = format!("list");
-        if uuids {
-            s.push_str(" uuids");
-        }
+        let s = format!("list {}", if uuids { "uuids" } else {""} );
         super::Command(s)
     }
 }
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