diff --git a/src/BuildTiles/Main/main.cxx b/src/BuildTiles/Main/main.cxx
index 50ade58a..003af49b 100644
--- a/src/BuildTiles/Main/main.cxx
+++ b/src/BuildTiles/Main/main.cxx
@@ -51,6 +51,7 @@
 #include <simgear/constants.h>
 #include <simgear/bucket/newbucket.hxx>
 #include <simgear/debug/logstream.hxx>
+#include <simgear/math/polar3d.hxx>
 
 #include <Geometry/poly_support.hxx>
 #include <Array/array.hxx>