diff --git a/runtime/etc/mapserver.conf b/runtime/etc/mapserver.conf
index b6291c76..3f8a3939 100644
--- a/runtime/etc/mapserver.conf
+++ b/runtime/etc/mapserver.conf
@@ -28,7 +28,7 @@ CONFIG
     #
     # Proj Library
     #
-    # PROJ_LIB ""
+    # PROJ_DATA "/usr/local/share/proj/"
 
     #
     # Request Control