restore some part of the code to prevent an untwanted segmentationf fault.

[simgear.git] / simgear / structure / subsystem_mgr.cxx

diff --git a/simgear/structure/subsystem_mgr.cxx b/simgear/structure/subsystem_mgr.cxx
index 1385d8eab493a5181e2b94f837be431bfeb22eb4..0ed6b43623913bb6d72dd3193805526f82123f4e 100644 (file)
--- a/simgear/structure/subsystem_mgr.cxx
+++ b/simgear/structure/subsystem_mgr.cxx
@@ -5,6 +5,8 @@
 #include "exception.hxx"
 #include "subsystem_mgr.hxx"
 
+#include <simgear/math/SGMath.hxx>
+
 
 \f
 ////////////////////////////////////////////////////////////////////////