diff --git a/librecad/src/lib/engine/rs_ellipse.cpp b/librecad/src/lib/engine/rs_ellipse.cpp

index b6253388..549f3a01 100644

--- a/librecad/src/lib/engine/rs_ellipse.cpp

+++ b/librecad/src/lib/engine/rs_ellipse.cpp

@@ -47,6 +47,7 @@

 #ifndef Q_MOC_RUN

 #include <boost/version.hpp>

 #include <boost/math/tools/roots.hpp>

+#include <boost/math/tools/tuple.hpp>

 #include <boost/math/special_functions/ellint_2.hpp>

 #endif