diff --git a/INSTALL.md b/INSTALL.md
index e7b2aeddd..04e9ecaf9 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -79,6 +79,7 @@ Additional optional dependencies:
  * libsqlite3 - SQLite input (needs RTree support builtin) (sqlite plugin support)
  * libocci - Oracle input plugin support
  * libcurl - OSM input plugin support
+ * librasterlite - Rasterlite input plugin support
 
 Instructions for installing many of these dependencies on
 various platforms can be found at the Mapnik Wiki: