diff --git a/doc/overview.t2t b/doc/overview.t2t
index 52844ec011b..91bf43314ba 100644
--- a/doc/overview.t2t
+++ b/doc/overview.t2t
@@ -19,10 +19,13 @@ Required build dependencies:
 - Proj >= 4.4.x
 - GEOS >= 3.4
 - Sqlite3 >= 3.0.0
+- SpatiaLite
+- libspatialindex
 - GDAL/OGR >= 2.0
 - Qwt >= 5.0 & (< 6.1 with internal QwtPolar)
 - expat >= 1.95
 - QScintilla2
+- QCA
 -
 
 Optional dependencies: