diff --git a/src/hru.rs b/src/hru.rs
index 2540fb8..0e0b25d 100644
--- a/src/hru.rs
+++ b/src/hru.rs
@@ -96,7 +96,7 @@ fn main() -> ExitCode {
 
 		let out = ((number * 10.0).round() / 10.0).to_string();
 
-		stdout().write_all(format!("{} {}", out, si_prefix).as_bytes())
+		stdout().write_all(format!("{} {}\n", out, si_prefix).as_bytes())
 			.unwrap_or_else(|e| {
 				eprintln!("{}: {}.", argv[0], e);
 				exit(EX_IOERR);