diff --git a/packages/libsql-client/src/http.ts b/packages/libsql-client/src/http.ts
index d6177e8..1ec283b 100644
--- a/packages/libsql-client/src/http.ts
+++ b/packages/libsql-client/src/http.ts
@@ -71,7 +71,7 @@ export class HttpClient implements Client {
     protocol: "http";
     #url: URL;
     #authToken: string | undefined;
-    #isSchemaDatabase: boolean | undefined;
+    #isSchemaDatabase: Promise<boolean> | undefined;
 
     /** @private */
     constructor(
@@ -87,9 +87,9 @@ export class HttpClient implements Client {
         this.#authToken = authToken;
     }
 
-    async getIsSchemaDatabase(): Promise<boolean> {
+    getIsSchemaDatabase(): Promise<boolean> {
         if (this.#isSchemaDatabase === undefined) {
-            this.#isSchemaDatabase = await getIsSchemaDatabase({
+            this.#isSchemaDatabase = getIsSchemaDatabase({
                 authToken: this.#authToken,
                 baseUrl: this.#url.origin,
             });
diff --git a/packages/libsql-client/src/ws.ts b/packages/libsql-client/src/ws.ts
index d628a59..91088d8 100644
--- a/packages/libsql-client/src/ws.ts
+++ b/packages/libsql-client/src/ws.ts
@@ -124,7 +124,7 @@ export class WsClient implements Client {
     #futureConnState: ConnState | undefined;
     closed: boolean;
     protocol: "ws";
-    #isSchemaDatabase: boolean | undefined;
+    #isSchemaDatabase: Promise<boolean> | undefined;
 
     /** @private */
     constructor(
@@ -142,9 +142,9 @@ export class WsClient implements Client {
         this.protocol = "ws";
     }
 
-    async getIsSchemaDatabase(): Promise<boolean> {
+    getIsSchemaDatabase(): Promise<boolean> {
         if (this.#isSchemaDatabase === undefined) {
-            this.#isSchemaDatabase = await getIsSchemaDatabase({
+            this.#isSchemaDatabase = getIsSchemaDatabase({
                 authToken: this.#authToken,
                 baseUrl: this.#url.origin,
             });