diff --git a/runtime/doc/gui_w32.txt b/runtime/doc/gui_w32.txt
index 0cf012b..d8ce03e 100644
--- a/runtime/doc/gui_w32.txt
+++ b/runtime/doc/gui_w32.txt
@@ -17,7 +17,7 @@
 
 Other relevant documentation:
 |gui.txt|	For generic items of the GUI.
-|os_win32.txt| 	For Win32 specific items.
+|os_win32.txt|	For Win32 specific items.
 
 
 ==============================================================================