diff --git a/src/legacy/ui/public/vis/map/service_settings.js b/src/legacy/ui/public/vis/map/service_settings.js
index 9f3d21831e3da..a014aeb182c67 100644
--- a/src/legacy/ui/public/vis/map/service_settings.js
+++ b/src/legacy/ui/public/vis/map/service_settings.js
@@ -53,6 +53,10 @@ uiModules
           tileApiUrl: mapConfig.emsTileApiUrl,
           htmlSanitizer: $sanitize,
           landingPageUrl: mapConfig.emsLandingPageUrl,
+          // Wrap to avoid errors passing window fetch
+          fetchFunction: function(...args) {
+            return fetch(...args);
+          },
         });
       }
 
diff --git a/x-pack/legacy/plugins/maps/server/routes.js b/x-pack/legacy/plugins/maps/server/routes.js
index 6aacfdc41aeea..20e022001577a 100644
--- a/x-pack/legacy/plugins/maps/server/routes.js
+++ b/x-pack/legacy/plugins/maps/server/routes.js
@@ -44,6 +44,7 @@ export function initRoutes(server, licenseUid) {
       fileApiUrl: mapConfig.emsFileApiUrl,
       tileApiUrl: mapConfig.emsTileApiUrl,
       landingPageUrl: mapConfig.emsLandingPageUrl,
+      fetchFunction: fetch,
     });
     emsClient.addQueryParams({ license: licenseUid });
   } else {