diff --git a/binding_tests/interface_test.go b/binding_tests/interface_test.go
index 9de8b93b..d84875d4 100644
--- a/binding_tests/interface_test.go
+++ b/binding_tests/interface_test.go
@@ -145,6 +145,7 @@ func TestSignOrderMatching(t *testing.T) {
         true,
         2,
         5,
+        nil,
     )
     taker, err = sdk.CreateSignedOrder(
         zklink_signer,
@@ -166,6 +167,7 @@ func TestSignOrderMatching(t *testing.T) {
          false,
          2,
          5,
+         nil,
     )
     maker, err = sdk.CreateSignedOrder(
         zklink_signer,
diff --git a/bindings/sdk/src/ffi.udl b/bindings/sdk/src/ffi.udl
index 232cc475..9f57d3ed 100644
--- a/bindings/sdk/src/ffi.udl
+++ b/bindings/sdk/src/ffi.udl
@@ -242,7 +242,8 @@ interface Order {
         BigUint price,
         boolean is_sell,
         u8 fee_ratio1,
-        u8 fee_ratio2
+        u8 fee_ratio2,
+        ZkLinkSignature ?signature
     );
     ZkLinkSignature signature();
     sequence<u8> get_bytes();
diff --git a/examples/Golang/5_order_matching.go b/examples/Golang/5_order_matching.go
index 33ed27a8..03060fff 100644
--- a/examples/Golang/5_order_matching.go
+++ b/examples/Golang/5_order_matching.go
@@ -36,6 +36,7 @@ func HighLevelOrderMatching() {
         true,
         2,
         5,
+        nil,
     )
     taker, err = sdk.CreateSignedOrder(
         zklinkSigner,
@@ -54,6 +55,7 @@ func HighLevelOrderMatching() {
          false,
          2,
          5,
+         nil,
     )
     maker, err = sdk.CreateSignedOrder(
         zklinkSigner,
diff --git a/types/src/tx_type/order_matching.rs b/types/src/tx_type/order_matching.rs
index 5e93932b..42361fc0 100644
--- a/types/src/tx_type/order_matching.rs
+++ b/types/src/tx_type/order_matching.rs
@@ -71,6 +71,7 @@ impl Order {
         is_sell: bool,
         fee_ratio1: u8,
         fee_ratio2: u8,
+        signature: Option<ZkLinkSignature>,
     ) -> Self {
         Self {
             account_id,
@@ -84,7 +85,7 @@ impl Order {
             is_sell: u8::from(is_sell),
             fee_ratio1,
             fee_ratio2,
-            signature: ZkLinkSignature::default(),
+            signature: signature.unwrap_or_default(),
         }
     }