diff --git a/packages/sdk/src/utils/index.ts b/packages/sdk/src/utils/index.ts
index 795fce3b..dc67631e 100644
--- a/packages/sdk/src/utils/index.ts
+++ b/packages/sdk/src/utils/index.ts
@@ -293,7 +293,7 @@ export const splitInscriptionId = (inscriptionId: string) => {
     throw new OrditSDKError(`Invalid inscriptionId: ${inscriptionId}`)
   }
   const indexNum = Number(index)
-  if (Number.isNaN(indexNum) || indexNum < 0 || index !== "") {
+  if (Number.isNaN(indexNum) || indexNum < 0 || index === "") {
     throw new OrditSDKError(`Invalid inscriptionId: ${inscriptionId}`)
   }