diff --git a/setup/index.php b/setup/index.php
index e5e3adb..c450c79 100644
--- a/setup/index.php
+++ b/setup/index.php
@@ -1,3 +1,14 @@
 <?php
+# If you are reading this, then your web server is not serving PHP files
+# correctly.  Please read the instructions in doc/INSTALL.txt to solve
+# this problem.
+#
+#
+#
+#
+#
+#
+#
+#
 header("Location: precheckup.php");
 ?>