diff --git a/basis/simple-flat-file/simple-flat-file.factor b/basis/simple-flat-file/simple-flat-file.factor
index 4fb68e2cf9..6e3cd4edfa 100644
--- a/basis/simple-flat-file/simple-flat-file.factor
+++ b/basis/simple-flat-file/simple-flat-file.factor
@@ -30,7 +30,7 @@ IN: simple-flat-file
     utf8 file-lines process-codetable-lines >biassoc ;
 
 : split-; ( line -- array )
-    ";" split [ [ blank? ] trim ] map! ;
+    ";" split [ [ blank? ] trim ] map! ; inline
 
 : load-data-file ( filename -- data )
     utf8 file-lines drop-comments [ split-; ] map! ;