diff --git a/README.md b/README.md
index 97160fd..5b3cfc6 100644
--- a/README.md
+++ b/README.md
@@ -21,8 +21,8 @@ Alternatively, turn it into a .love file you can double-click on:
 $ zip -r /tmp/text.love *.lua
 ```
 
-By default, it reads/writes the file `lines.txt` in your default
-user/home directory (`https://love2d.org/wiki/love.filesystem.getUserDirectory`).
+By default, it reads/writes the file `lines.txt` in a directory
+specific to this app (https://love2d.org/wiki/love.filesystem.getSourceBaseDirectory).
 
 To open a different file, drop it on the app window.
 
diff --git a/source_edit.lua b/source_edit.lua
index b70aab1..606b913 100644
--- a/source_edit.lua
+++ b/source_edit.lua
@@ -95,7 +95,7 @@ function edit.initialize_state(top, left, right, font_height, line_height)  -- c
     right = math.floor(right),
     width = right-left,
 
-    filename = love.filesystem.getUserDirectory()..'/lines.txt',  -- '/' should work even on Windows
+    filename = love.filesystem.getSourceBaseDirectory()..'/lines.txt',  -- '/' should work even on Windows
     next_save = nil,
 
     -- undo