diff --git a/nitransforms/io/lta.py b/nitransforms/io/lta.py
index ccc133fd..f9585905 100644
--- a/nitransforms/io/lta.py
+++ b/nitransforms/io/lta.py
@@ -162,7 +162,7 @@ def set_type(self, new_type):
     def to_ras(self, moving=None, reference=None):
         """Return a nitransforms internal RAS+ matrix."""
         self.set_type(1)
-        return self.structarr['m_L']
+        return np.linalg.inv(self.structarr['m_L'])
 
     def to_string(self):
         """Convert this transform to text."""