diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa52b19..6c4c989 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 ### Fixes
 
 - Use fullName(to show ancestor titles) for test name pattern plugin ([#26](https://github.com/jest-community/jest-watch-typeahead/pull/26))
+- Helpful error message when attempting to use the package main file ([#29](https://github.com/jest-community/jest-watch-typeahead/pull/29))
 
 ## 0.2.1
 
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..0544fee
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,10 @@
+// @flow
+
+throw new Error(`
+jest-watch-typeahead includes two watch plugins: The filename plugin and the testname plugin.
+Please configure Jest as follows:
+"watchPlugins": [
+  "jest-watch-typeahead/filename",
+  "jest-watch-typeahead/testname"
+]
+`);