diff --git a/basis/tools/files/files.factor b/basis/tools/files/files.factor
index e6ca02d5f9..9066f3a219 100755
--- a/basis/tools/files/files.factor
+++ b/basis/tools/files/files.factor
@@ -65,7 +65,7 @@ percent-used percent-free ;
     [ [ unparse ] map ] bi prefix simple-table. ;
 
 : file-systems. ( -- )
-    { device-name free-space used-space total-space percent-used mount-point }
+    { device-name available-space free-space used-space total-space percent-used mount-point }
     print-file-systems ;
 
 {