diff --git a/compiler/rustc_mir_build/messages.ftl b/compiler/rustc_mir_build/messages.ftl
index 55149570dbc4d..673a9bceb2718 100644
--- a/compiler/rustc_mir_build/messages.ftl
+++ b/compiler/rustc_mir_build/messages.ftl
@@ -203,7 +203,7 @@ mir_build_lower_range_bound_must_be_less_than_or_equal_to_upper =
 
 mir_build_lower_range_bound_must_be_less_than_upper = lower range bound must be less than upper
 
-mir_build_more_information = for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
+mir_build_more_information = for more information, visit https://doc.rust-lang.org/book/ch19-02-refutability.html
 
 mir_build_moved = value is moved into `{$name}` here
 
diff --git a/compiler/rustc_parse/messages.ftl b/compiler/rustc_parse/messages.ftl
index 1af7fb9b86a7c..ec3208875a90d 100644
--- a/compiler/rustc_parse/messages.ftl
+++ b/compiler/rustc_parse/messages.ftl
@@ -820,7 +820,7 @@ parse_unexpected_expr_in_pat =
     }, found an expression
 
     .label = not a pattern
-    .note = arbitrary expressions are not allowed in patterns: <https://doc.rust-lang.org/book/ch18-00-patterns.html>
+    .note = arbitrary expressions are not allowed in patterns: <https://doc.rust-lang.org/book/ch19-00-patterns.html>
 
 parse_unexpected_expr_in_pat_const_sugg = consider extracting the expression into a `const`