diff --git a/sdk/src/types/block/error.rs b/sdk/src/types/block/error.rs
index 9a909e5f1f..85c7d036a0 100644
--- a/sdk/src/types/block/error.rs
+++ b/sdk/src/types/block/error.rs
@@ -177,6 +177,9 @@ pub enum Error {
     Fallback(FallbackError),
 }
 
+#[cfg(feature = "std")]
+impl std::error::Error for Error {}
+
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
@@ -391,9 +394,6 @@ impl From<Infallible> for Error {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {}
-
 #[cfg(feature = "std")]
 #[derive(Debug)]
 pub struct FallbackError(pub(crate) Box<dyn std::error::Error + Send + Sync>);