Fix some markdown links to /doc/glossary.md
diff --git a/doc/wuffs-the-language.md b/doc/wuffs-the-language.md
index f93beb6..9b36d5f 100644
--- a/doc/wuffs-the-language.md
+++ b/doc/wuffs-the-language.md
@@ -82,9 +82,9 @@
Expressions involving the standard arithmetic operators (e.g. `*`, `+`), will
not compile if overflow is possible. Some of these operators have alternative
'tilde' forms (e.g. `~mod*`, `~sat+`) which provide
-[modular](/doc/glossary.md#modular-arithmetic.md) and
-[saturating](/doc/glossary.md#saturating-arithmetic.md) arithmetic. By
-definition, these never overflow.
+[modular](/doc/glossary.md#modular-arithmetic) and
+[saturating](/doc/glossary.md#saturating-arithmetic) arithmetic. By definition,
+these never overflow.
The `as` operator, e.g. `x as T`, converts an expression `x` to the type `T`.
