diff --git a/sdk/src/driftClient.ts b/sdk/src/driftClient.ts
index 22eefbe7e..80fc73c47 100644
--- a/sdk/src/driftClient.ts
+++ b/sdk/src/driftClient.ts
@@ -589,7 +589,7 @@ export class DriftClient {
 	}
 
 	public async switchActiveUser(subAccountId: number, authority?: PublicKey) {
-		const authorityChanged = !this.authority?.equals(authority);
+		const authorityChanged = authority && !this.authority?.equals(authority);
 
 		this.activeSubAccountId = subAccountId;
 		this.authority = authority ?? this.authority;