diff --git a/Cargo.lock b/Cargo.lock
index 5fdf3e898fa..35488894134 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -161,6 +161,7 @@ dependencies = [
 name = "chalk-parse"
 version = "0.76.0-dev.0"
 dependencies = [
+ "indexmap",
  "lalrpop",
  "lalrpop-util",
  "regex",
diff --git a/chalk-parse/Cargo.toml b/chalk-parse/Cargo.toml
index e23b2b3b292..9b367239a80 100644
--- a/chalk-parse/Cargo.toml
+++ b/chalk-parse/Cargo.toml
@@ -16,6 +16,7 @@ version = "0.19"
 features = ["lexer"]
 
 [dependencies]
+indexmap = "1.7.0"
 lalrpop-util = "0.19"
 regex = "1.3"
 string_cache = "0.8.0"