diff --git a/Cargo.lock b/Cargo.lock
index 3c0f1c9dc2d..0c1f372968c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4182,7 +4182,6 @@ dependencies = [
  "rustc_lexer",
  "rustc_session",
  "rustc_span",
- "smallvec",
  "tracing",
  "unicode-normalization",
 ]
diff --git a/compiler/rustc_parse/Cargo.toml b/compiler/rustc_parse/Cargo.toml
index c887729c355..60c21757194 100644
--- a/compiler/rustc_parse/Cargo.toml
+++ b/compiler/rustc_parse/Cargo.toml
@@ -19,4 +19,3 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_ast = { path = "../rustc_ast" }
 unicode-normalization = "0.1.11"
-smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }