diff --git a/content/html/document/public/MANIFEST b/content/html/document/public/MANIFEST
index 6ef810a904d..e69de29bb2d 100644
--- a/content/html/document/public/MANIFEST
+++ b/content/html/document/public/MANIFEST
@@ -1,4 +0,0 @@
-#
-# This is a list of local files which get copied to the mozilla:dist:content directory
-#
-nsIWyciwygChannel.idl
diff --git a/content/html/document/public/MANIFEST_IDL b/content/html/document/public/MANIFEST_IDL
new file mode 100644
index 00000000000..b9ae4d67c8e
--- /dev/null
+++ b/content/html/document/public/MANIFEST_IDL
@@ -0,0 +1,4 @@
+#
+# This is a list of local files which get copied to the mozilla:dist:idl directory
+#
+nsIWyciwygChannel.idl