diff --git a/gtsam/hybrid/HybridBayesNet.h b/gtsam/hybrid/HybridBayesNet.h
index e84103a50..f28224d37 100644
--- a/gtsam/hybrid/HybridBayesNet.h
+++ b/gtsam/hybrid/HybridBayesNet.h
@@ -73,6 +73,8 @@ class GTSAM_EXPORT HybridBayesNet : public BayesNet<HybridConditional> {
         HybridConditional(boost::make_shared<DiscreteConditional>(key, table)));
   }
 
+  using Base::push_back;
+
   /// Get a specific Gaussian mixture by index `i`.
   GaussianMixture::shared_ptr atMixture(size_t i) const;
 
diff --git a/gtsam/hybrid/tests/testHybridBayesNet.cpp b/gtsam/hybrid/tests/testHybridBayesNet.cpp
index 0c15ee83d..cc2ab1759 100644
--- a/gtsam/hybrid/tests/testHybridBayesNet.cpp
+++ b/gtsam/hybrid/tests/testHybridBayesNet.cpp
@@ -52,6 +52,21 @@ TEST(HybridBayesNet, Creation) {
   EXPECT(df.equals(expected));
 }
 
+/* ****************************************************************************/
+// Test adding a bayes net to another one.
+TEST(HybridBayesNet, Add) {
+  HybridBayesNet bayesNet;
+
+  bayesNet.add(Asia, "99/1");
+
+  DiscreteConditional expected(Asia, "99/1");
+
+  HybridBayesNet other;
+  other.push_back(bayesNet);
+  EXPECT(bayesNet.equals(other));
+}
+
+
 /* ****************************************************************************/
 // Test choosing an assignment of conditionals
 TEST(HybridBayesNet, Choose) {