diff --git a/src/uu/numfmt/src/options.rs b/src/uu/numfmt/src/options.rs
index 74c77a5b3bf..634dc70be6e 100644
--- a/src/uu/numfmt/src/options.rs
+++ b/src/uu/numfmt/src/options.rs
@@ -247,7 +247,7 @@ impl FromStr for InvalidModes {
             "fail" => Ok(Self::Fail),
             "warn" => Ok(Self::Warn),
             "ignore" => Ok(Self::Ignore),
-            unknown => Err(format!("Unknown invalid mode: {}", unknown)),
+            unknown => Err(format!("Unknown invalid mode: {unknown}")),
         }
     }
 }