diff --git a/src/sdk/base.ts b/src/sdk/base.ts
index 51ae66083..077dc2a07 100644
--- a/src/sdk/base.ts
+++ b/src/sdk/base.ts
@@ -478,14 +478,17 @@ export class BaseOpenSeaSDK {
     return this._cancellationManager.cancelOrders(options)
   }
 
-  /** Cancel an order onchain, preventing it from ever being fulfilled. */
+  /**
+   * Cancel an order onchain, preventing it from ever being fulfilled.
+   * @returns Transaction hash of the cancellation.
+   */
   public async cancelOrder(options: {
     order?: OrderV2
     orderHash?: string
     accountAddress: string
     protocolAddress?: string
     domain?: string
-  }) {
+  }): Promise<string> {
     return this._cancellationManager.cancelOrder(options)
   }
 
diff --git a/src/sdk/cancellation.ts b/src/sdk/cancellation.ts
index fc9b24870..9babe8ddb 100644
--- a/src/sdk/cancellation.ts
+++ b/src/sdk/cancellation.ts
@@ -44,7 +44,7 @@ export class CancellationManager {
     accountAddress: string
     protocolAddress?: string
     domain?: string
-  }) {
+  }): Promise<string> {
     // Validate input
     if (!order && !orderHash) {
       throw new Error(
@@ -106,6 +106,7 @@ export class CancellationManager {
       EventType.CancelOrder,
       "Cancelling order",
     )
+    return transactionHash
   }
 
   /**