diff --git a/docs/changelog.txt b/docs/changelog.txt
index 0009b1a95..28181b2dd 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -53,7 +53,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 
 ## Lua
 - new string utility function: ``string:wrap(width)`` wraps a string at space-separated word boundaries
-- new string utility function: ``string:trim()`` removes space characters from the beginning and end of the string
+- new string utility function: ``string:trim()`` removes whitespace characters from the beginning and end of the string
 - new library: ``argparse`` is a collection of commandline argument processing functions
 - ``gui.Painter``: fixed error when calling ``viewport()`` method
 - ``gui.dwarfmode``: new function: ``enterSidebarMode(sidebar_mode, max_esc)`` which uses keypresses to get into the specified sidebar mode from whatever the current screen is