diff --git a/public/app/plugins/datasource/loki/datasource.test.ts b/public/app/plugins/datasource/loki/datasource.test.ts
index cc5c4abc715..ff3a5496162 100644
--- a/public/app/plugins/datasource/loki/datasource.test.ts
+++ b/public/app/plugins/datasource/loki/datasource.test.ts
@@ -188,7 +188,7 @@ describe('LokiDatasource', () => {
         expect(backendSrv.fetch).toBeCalledWith(
           expect.objectContaining({
             headers: {
-              'X-Query-Tag': 'Source=logvolhist',
+              'X-Query-Tags': 'Source=logvolhist',
             },
           })
         );
@@ -200,7 +200,7 @@ describe('LokiDatasource', () => {
         expect(backendSrv.fetch).not.toBeCalledWith(
           expect.objectContaining({
             headers: {
-              'X-Query-Tag': 'Source=logvolhist',
+              'X-Query-Tags': 'Source=logvolhist',
             },
           })
         );
diff --git a/public/app/plugins/datasource/loki/datasource.ts b/public/app/plugins/datasource/loki/datasource.ts
index 90c9668c06c..13705e7fc7f 100644
--- a/public/app/plugins/datasource/loki/datasource.ts
+++ b/public/app/plugins/datasource/loki/datasource.ts
@@ -281,7 +281,7 @@ export class LokiDatasource
     }
     const query = this.createRangeQuery(target, options, maxDataPoints);
 
-    const headers = target.volumeQuery ? { 'X-Query-Tag': 'Source=logvolhist' } : undefined;
+    const headers = target.volumeQuery ? { 'X-Query-Tags': 'Source=logvolhist' } : undefined;
 
     return this._request(RANGE_QUERY_ENDPOINT, query, { headers }).pipe(
       catchError((err) => throwError(() => this.processError(err, target))),