Expose vertical speed for MP planes

[flightgear.git] / src / AIModel / performancedb.cxx

diff --git a/src/AIModel/performancedb.cxx b/src/AIModel/performancedb.cxx
index 3f9aafa6893f704d496f68d89a9308ef263be529..f7c286a9a345b8aea1d73ff6d5b9160f151a89b6 100644 (file)
--- a/src/AIModel/performancedb.cxx
+++ b/src/AIModel/performancedb.cxx
@@ -1,3 +1,4 @@
+#include <simgear/math/SGMath.hxx>
 #include <simgear/misc/sg_path.hxx>
 #include <simgear/props/props.hxx>
 #include <simgear/props/props_io.hxx>