X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FEnvironment%2Fenvironment_ctrl.cxx;h=98f59cb9ef61eb1694f5d74dbd0c995d2095f043;hb=a1031b052dd40ca3a4ea68dcd7f572b7d9e4bb24;hp=e7c8820fa4a3d82a686577587b1d3eb315f85327;hpb=e9a9f8c96d2963f28e4ecb4eaa91e47b52aaecf6;p=flightgear.git

diff --git a/src/Environment/environment_ctrl.cxx b/src/Environment/environment_ctrl.cxx
index e7c8820fa..98f59cb9e 100644
--- a/src/Environment/environment_ctrl.cxx
+++ b/src/Environment/environment_ctrl.cxx
@@ -26,6 +26,7 @@
 
 #include <algorithm>
 
+#include <simgear/math/SGMath.hxx>
 #include <Main/fg_props.hxx>
 #include "environment_ctrl.hxx"
 #include "environment.hxx"