diff --git a/api/io/all-features.txt b/api/io/all-features.txt
index 1a6cb4f7a..46b6a2935 100644
--- a/api/io/all-features.txt
+++ b/api/io/all-features.txt
@@ -1,6 +1,5 @@
 #[repr(transparent)] pub struct bitcoin_io::FromStd<T>(_)
 #[repr(transparent)] pub struct bitcoin_io::ToStd<T>(_)
-impl !core::marker::Sync for bitcoin_io::Error
 impl !core::panic::unwind_safe::RefUnwindSafe for bitcoin_io::Error
 impl !core::panic::unwind_safe::UnwindSafe for bitcoin_io::Error
 impl bitcoin_io::BufRead for &[u8]
@@ -70,6 +69,7 @@ impl core::marker::Send for bitcoin_io::Error
 impl core::marker::Send for bitcoin_io::ErrorKind
 impl core::marker::Send for bitcoin_io::Sink
 impl core::marker::StructuralPartialEq for bitcoin_io::ErrorKind
+impl core::marker::Sync for bitcoin_io::Error
 impl core::marker::Sync for bitcoin_io::ErrorKind
 impl core::marker::Sync for bitcoin_io::Sink
 impl core::marker::Unpin for bitcoin_io::Error
diff --git a/api/io/alloc-only.txt b/api/io/alloc-only.txt
index e0d9a76e5..5cb612794 100644
--- a/api/io/alloc-only.txt
+++ b/api/io/alloc-only.txt
@@ -1,4 +1,3 @@
-impl !core::marker::Sync for bitcoin_io::Error
 impl !core::panic::unwind_safe::RefUnwindSafe for bitcoin_io::Error
 impl !core::panic::unwind_safe::UnwindSafe for bitcoin_io::Error
 impl bitcoin_io::BufRead for &[u8]
@@ -28,6 +27,7 @@ impl core::marker::Send for bitcoin_io::Error
 impl core::marker::Send for bitcoin_io::ErrorKind
 impl core::marker::Send for bitcoin_io::Sink
 impl core::marker::StructuralPartialEq for bitcoin_io::ErrorKind
+impl core::marker::Sync for bitcoin_io::Error
 impl core::marker::Sync for bitcoin_io::ErrorKind
 impl core::marker::Sync for bitcoin_io::Sink
 impl core::marker::Unpin for bitcoin_io::Error
diff --git a/api/io/no-features.txt b/api/io/no-features.txt
index 3874ee8f7..493aab930 100644
--- a/api/io/no-features.txt
+++ b/api/io/no-features.txt
@@ -1,4 +1,3 @@
-impl !core::marker::Sync for bitcoin_io::Error
 impl !core::panic::unwind_safe::RefUnwindSafe for bitcoin_io::Error
 impl !core::panic::unwind_safe::UnwindSafe for bitcoin_io::Error
 impl bitcoin_io::BufRead for &[u8]
@@ -27,6 +26,7 @@ impl core::marker::Send for bitcoin_io::Error
 impl core::marker::Send for bitcoin_io::ErrorKind
 impl core::marker::Send for bitcoin_io::Sink
 impl core::marker::StructuralPartialEq for bitcoin_io::ErrorKind
+impl core::marker::Sync for bitcoin_io::Error
 impl core::marker::Sync for bitcoin_io::ErrorKind
 impl core::marker::Sync for bitcoin_io::Sink
 impl core::marker::Unpin for bitcoin_io::Error