diff --git a/src/core/course/providers/helper.ts b/src/core/course/providers/helper.ts
index 25d5137eb..1ba933eac 100644
--- a/src/core/course/providers/helper.ts
+++ b/src/core/course/providers/helper.ts
@@ -566,7 +566,7 @@ export class CoreCourseHelperProvider {
         siteId = siteId || this.sitesProvider.getCurrentSiteId();
 
         let promise;
-        if (files) {
+        if (files && files.length) {
             promise = Promise.resolve(files);
         } else {
             promise = this.courseProvider.loadModuleContents(module, courseId).then(() => {