diff --git a/src/hru.rs b/src/hru.rs
index 65b61f6..26f3343 100644
--- a/src/hru.rs
+++ b/src/hru.rs
@@ -28,7 +28,7 @@ extern crate sysexits;
 use sysexits::{ EX_DATAERR, EX_SOFTWARE };
 
 const LIST: [(u32, &str); 10] = [
-	(3, "K"),
+	(3, "k"),
 	(6, "M"),
 	(9, "G"),
 	(12, "T"),