diff --git a/tools/virsh.c b/tools/virsh.c
index f5a01b3d5bfba6580f1961c38187a73f92bb1cab..d64e539660d4d951b7e938005fbe7505c6d4860f 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -148,7 +148,7 @@ double
 vshPrettyCapacity(unsigned long long val, const char **unit)
 {
     if (val < 1024) {
-        *unit = "";
+        *unit = "B";
         return (double)val;
     } else if (val < (1024.0l * 1024.0l)) {
         *unit = "KiB";