diff --git a/internal/src/pin_data.rs b/internal/src/pin_data.rs
index 7d871236..18018b5d 100644
--- a/internal/src/pin_data.rs
+++ b/internal/src/pin_data.rs
@@ -79,9 +79,13 @@ pub(crate) fn pin_data(
         .map(|field| {
             let len = field.attrs.len();
             field.attrs.retain(|a| !a.path().is_ident("pin"));
-            (len != field.attrs.len(), &*field)
+            let diff = len - field.attrs.len();
+            if diff > 1 {
+                return Err(dcx.error(field, "#[pin] attribute specified more than once"));
+            }
+            Ok((diff > 0, &*field))
         })
-        .collect();
+        .collect::<Result<_, _>>()?;
 
     for (pinned, field) in &fields {
         if !pinned && is_phantom_pinned(&field.ty) {
diff --git a/tests/ui/compile-fail/pin_data/twice_pin.rs b/tests/ui/compile-fail/pin_data/twice_pin.rs
new file mode 100644
index 00000000..c28dedd2
--- /dev/null
+++ b/tests/ui/compile-fail/pin_data/twice_pin.rs
@@ -0,0 +1,10 @@
+use pin_init::*;
+
+#[pin_data]
+struct Foo {
+    #[pin]
+    #[pin]
+    a: usize,
+}
+
+fn main() {}
diff --git a/tests/ui/compile-fail/pin_data/twice_pin.stderr b/tests/ui/compile-fail/pin_data/twice_pin.stderr
new file mode 100644
index 00000000..2a7ba524
--- /dev/null
+++ b/tests/ui/compile-fail/pin_data/twice_pin.stderr
@@ -0,0 +1,5 @@
+error: #[pin] attribute specified more than once
+ --> tests/ui/compile-fail/pin_data/twice_pin.rs:7:5
+  |
+7 |     a: usize,
+  |     ^^^^^^^^