diff --git a/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java b/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java
index 165a829c396..bc62b013f1e 100644
--- a/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java
+++ b/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java
@@ -484,6 +484,7 @@ final class RequestConverters {
         if (multiSearchTemplateRequest.maxConcurrentSearchRequests() != MultiSearchRequest.MAX_CONCURRENT_SEARCH_REQUESTS_DEFAULT) {
             params.putParam("max_concurrent_searches", Integer.toString(multiSearchTemplateRequest.maxConcurrentSearchRequests()));
         }
+        request.addParameters(params.asMap());
 
         XContent xContent = REQUEST_BODY_CONTENT_TYPE.xContent();
         byte[] source = MultiSearchTemplateRequest.writeMultiLineFormat(multiSearchTemplateRequest, xContent);
diff --git a/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java b/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java
index d328200d630..33c51b8aa61 100644
--- a/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java
+++ b/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java
@@ -1407,12 +1407,20 @@ public class RequestConvertersTests extends ESTestCase {
             multiSearchTemplateRequest.add(searchTemplateRequest);
         }
 
+        Map<String, String> expectedParams = new HashMap<>();
+        if (randomBoolean()) {
+            multiSearchTemplateRequest.maxConcurrentSearchRequests(randomIntBetween(1,10));
+            expectedParams.put("max_concurrent_searches", Integer.toString(multiSearchTemplateRequest.maxConcurrentSearchRequests()));
+        }
+        expectedParams.put(RestSearchAction.TYPED_KEYS_PARAM, "true");
+
         Request multiRequest = RequestConverters.multiSearchTemplate(multiSearchTemplateRequest);
 
         assertEquals(HttpPost.METHOD_NAME, multiRequest.getMethod());
         assertEquals("/_msearch/template", multiRequest.getEndpoint());
         List<SearchTemplateRequest> searchRequests = multiSearchTemplateRequest.requests();
         assertEquals(numSearchRequests, searchRequests.size());
+        assertEquals(expectedParams, multiRequest.getParameters());
 
         HttpEntity actualEntity = multiRequest.getEntity();
         byte[] expectedBytes = MultiSearchTemplateRequest.writeMultiLineFormat(multiSearchTemplateRequest, XContentType.JSON.xContent());