diff --git a/graphics/text/help.txt b/graphics/text/help.txt
index 05815b1a..561e9b35 100644
--- a/graphics/text/help.txt
+++ b/graphics/text/help.txt
@@ -17,4 +17,4 @@ and abilities.
 
 For more info, see the Freedoom manual:
 
- https://freedoom.github.io/manual.pdf
+ https://freedoom.github.io/manual.txt