diff --git a/Cargo.lock b/Cargo.lock
index c97313d9..788d785c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -73,7 +73,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "serde_json",
- "syn",
+ "syn 2.0.106",
  "toml",
 ]
 
@@ -96,7 +96,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustc_version",
- "syn",
+ "syn 3.0.3",
 ]
 
 [[package]]
@@ -106,7 +106,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
 dependencies = [
  "proc-macro2",
- "syn",
+ "syn 2.0.106",
 ]
 
 [[package]]
@@ -165,7 +165,7 @@ checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.106",
 ]
 
 [[package]]
@@ -199,6 +199,17 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "syn"
+version = "3.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53e9bae58849f64dfa4f5d5ae372c8341f7305f82a3868709269343628b659a3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "target-triple"
 version = "0.1.4"
diff --git a/internal/Cargo.toml b/internal/Cargo.toml
index e2714fb3..a434acf6 100644
--- a/internal/Cargo.toml
+++ b/internal/Cargo.toml
@@ -16,7 +16,7 @@ proc-macro = true
 [dependencies]
 quote = "1.0.40"
 proc-macro2 = "1.0.101"
-syn = { version = "2.0.106", features = ["full", "parsing", "visit-mut"] }
+syn = { version = "3", features = ["full", "parsing", "visit-mut"] }
 
 [build-dependencies]
 rustc_version = "0.4"
diff --git a/internal/src/pin_data.rs b/internal/src/pin_data.rs
index 44381076..13e25dfc 100644
--- a/internal/src/pin_data.rs
+++ b/internal/src/pin_data.rs
@@ -140,7 +140,11 @@ pub(crate) fn pin_data(
 
 fn is_phantom_pinned(ty: &Type) -> bool {
     match ty {
-        Type::Path(TypePath { qself: None, path }) => {
+        Type::Path(TypePath {
+            qself: None,
+            path,
+            attrs: _,
+        }) => {
             // Cannot possibly refer to `PhantomPinned` (except alias, but that's on the user).
             if path.segments.len() > 3 {
                 return false;
diff --git a/internal/src/pinned_drop.rs b/internal/src/pinned_drop.rs
index a20ac314..addef870 100644
--- a/internal/src/pinned_drop.rs
+++ b/internal/src/pinned_drop.rs
@@ -16,8 +16,8 @@ pub(crate) fn pinned_drop(
     }
     input.unsafety = Some(Token![unsafe](input.impl_token.span));
     match &mut input.trait_ {
-        Some((not, path, _for)) => {
-            if let Some(not) = not {
+        Some((path, _for)) => {
+            if let Some(not) = input.modifiers.polarity {
                 dcx.error(not, "cannot implement `!PinnedDrop`");
             }
             for (seg, expected) in path
diff --git a/tests/ui/compile-fail/init/missing_error_type.stderr b/tests/ui/compile-fail/init/missing_error_type.stderr
index 9e9a1478..8be1335e 100644
--- a/tests/ui/compile-fail/init/missing_error_type.stderr
+++ b/tests/ui/compile-fail/init/missing_error_type.stderr
@@ -1,4 +1,4 @@
-error: unexpected end of input, expected one of: `for`, parentheses, `fn`, `unsafe`, `extern`, identifier, `::`, `<`, `dyn`, square brackets, `*`, `&`, `!`, `impl`, `_`, lifetime
+error: unexpected end of input, expected one of: `for`, parentheses, `unsafe`, `fn`, `extern`, identifier, `::`, `<`, `dyn`, square brackets, `*`, `&`, `!`, `impl`, `_`, lifetime
  --> tests/ui/compile-fail/init/missing_error_type.rs:8:13
   |
 8 |     let _ = init!(Foo { x: Box::new(0)? }?);