diff --git a/src/geometry/LineTransformation.hpp b/src/geometry/LineTransformation.hpp
index ae0b00a8a1dce7e4b6b6bb13a737ee1114a202f1..c9f7def71f9d342cca580debf09aa8e77316c556 100644
--- a/src/geometry/LineTransformation.hpp
+++ b/src/geometry/LineTransformation.hpp
@@ -59,6 +59,13 @@ class LineTransformation
     return x[0] * m_velocity + m_shift;
   }
 
+  PUGS_INLINE
+  const TinyVector<Dimension>&
+  velocity() const
+  {
+    return m_velocity;
+  }
+
   double
   velocityNorm() const
   {