diff --git a/gtsam/linear/linear.i b/gtsam/linear/linear.i
index 577cc8acf..3a629f349 100644
--- a/gtsam/linear/linear.i
+++ b/gtsam/linear/linear.i
@@ -510,8 +510,8 @@ virtual class GaussianConditional : gtsam::JacobianFactor {
   GaussianConditional(size_t key, gtsam::Vector d, gtsam::Matrix R, size_t name1, gtsam::Matrix S,
                       size_t name2, gtsam::Matrix T,
                       const gtsam::noiseModel::Diagonal* sigmas);
-  GaussianConditional(const vector<std::pair<gtsam::Key, Matrix>> terms,
-                      size_t nrFrontals, Vector d,
+  GaussianConditional(const vector<std::pair<gtsam::Key, gtsam::Matrix>> terms,
+                      size_t nrFrontals, gtsam::Vector d,
                       const gtsam::noiseModel::Diagonal* sigmas);
 
   // Constructors with no noise model