diff --git a/gtsam/hybrid/GaussianMixture.cpp b/gtsam/hybrid/GaussianMixture.cpp
index 12e88f81d..a8d3ca502 100644
--- a/gtsam/hybrid/GaussianMixture.cpp
+++ b/gtsam/hybrid/GaussianMixture.cpp
@@ -44,11 +44,11 @@ const GaussianMixture::Conditionals &GaussianMixture::conditionals() const {
 
 /* *******************************************************************************/
 GaussianMixture::GaussianMixture(
-    const KeyVector &continuousFrontals, const KeyVector &continuousParents,
-    const DiscreteKeys &discreteParents,
-    const std::vector<GaussianConditional::shared_ptr> &conditionalsList)
+    KeyVector &&continuousFrontals, KeyVector &&continuousParents,
+    DiscreteKeys &&discreteParents,
+    std::vector<GaussianConditional::shared_ptr> &&conditionals)
     : GaussianMixture(continuousFrontals, continuousParents, discreteParents,
-                      Conditionals(discreteParents, conditionalsList)) {}
+                      Conditionals(discreteParents, conditionals)) {}
 
 /* *******************************************************************************/
 GaussianFactorGraphTree GaussianMixture::add(
diff --git a/gtsam/hybrid/GaussianMixture.h b/gtsam/hybrid/GaussianMixture.h
index ba84b5ade..8077059a4 100644
--- a/gtsam/hybrid/GaussianMixture.h
+++ b/gtsam/hybrid/GaussianMixture.h
@@ -112,10 +112,9 @@ class GTSAM_EXPORT GaussianMixture
    * @param discreteParents Discrete parents variables
    * @param conditionals List of conditionals
    */
-  GaussianMixture(
-      const KeyVector &continuousFrontals, const KeyVector &continuousParents,
-      const DiscreteKeys &discreteParents,
-      const std::vector<GaussianConditional::shared_ptr> &conditionals);
+  GaussianMixture(KeyVector &&continuousFrontals, KeyVector &&continuousParents,
+                  DiscreteKeys &&discreteParents,
+                  std::vector<GaussianConditional::shared_ptr> &&conditionals);
 
   /// @}
   /// @name Testable