diff --git a/packages/binding-opcua/src/opcua-protocol-client.ts b/packages/binding-opcua/src/opcua-protocol-client.ts
index 3ced84c42..c379f6479 100644
--- a/packages/binding-opcua/src/opcua-protocol-client.ts
+++ b/packages/binding-opcua/src/opcua-protocol-client.ts
@@ -279,7 +279,7 @@ export class OPCUAProtocolClient implements ProtocolClient {
         const nodeId = await this._resolveNodeId2(form, fNodeId);
         return await this._withSession<DataType>(form, async (session) => {
             const dataTypeOrNull = await getBuiltInDataType(session, nodeId);
-            if (dataTypeOrNull != undefined && dataTypeOrNull !== DataType.Null) {
+            if (dataTypeOrNull !== undefined && dataTypeOrNull !== DataType.Null) {
                 return dataTypeOrNull;
             }
             throw new Error("cannot predict dataType for nodeId " + nodeId.toString());