diff --git a/gtsam/hybrid/HybridValues.h b/gtsam/hybrid/HybridValues.h
index 7fa212018..80c942a83 100644
--- a/gtsam/hybrid/HybridValues.h
+++ b/gtsam/hybrid/HybridValues.h
@@ -96,7 +96,7 @@ class GTSAM_EXPORT HybridValues {
    * the key \c j is already used.
    * @param value The vector to be inserted.
    * @param j The index with which the value will be associated. */
-  void insert(Key j, int value) { discrete_[j] = value; };
+  void insert(Key j, size_t value) { discrete_[j] = value; };
 
   /** Insert a vector \c value with key \c j.  Throws an invalid_argument
    * exception if the key \c j is already used.
diff --git a/gtsam/hybrid/hybrid.i b/gtsam/hybrid/hybrid.i
index acda94638..c98c07f65 100644
--- a/gtsam/hybrid/hybrid.i
+++ b/gtsam/hybrid/hybrid.i
@@ -6,10 +6,11 @@ namespace gtsam {
 
 #include <gtsam/hybrid/HybridValues.h>
 class HybridValues {
-  gtsam::DiscreteValues discrete() const;
   gtsam::VectorValues continuous() const;
+  gtsam::DiscreteValues discrete() const;
+
   HybridValues();
-  HybridValues(const gtsam::DiscreteValues &dv, const gtsam::VectorValues &cv);
+  HybridValues(const gtsam::VectorValues &cv, const gtsam::DiscreteValues &dv);
   void print(string s = "HybridValues",
              const gtsam::KeyFormatter& keyFormatter =
                  gtsam::DefaultKeyFormatter) const;