diff --git a/gtsam/linear/linear.i b/gtsam/linear/linear.i
index 6862646ae..8bd3dcb88 100644
--- a/gtsam/linear/linear.i
+++ b/gtsam/linear/linear.i
@@ -489,7 +489,7 @@ virtual class GaussianConditional : gtsam::JacobianFactor {
   GaussianConditional(size_t key, Vector d, Matrix R, size_t name1, Matrix S,
                       size_t name2, Matrix T,
                       const gtsam::noiseModel::Diagonal* sigmas);
-  GaussianConditional(const vector<std::pair<gtsam::Key, Matrix>> terms,
+  GaussianConditional(const std::vector<std::pair<gtsam::Key, Matrix>> terms,
                       size_t nrFrontals, Vector d,
                       const gtsam::noiseModel::Diagonal* sigmas);
 
@@ -751,4 +751,4 @@ class KalmanFilter {
       Vector z, Matrix Q);
 };
 
-}
\ No newline at end of file
+}