diff --git a/gtsam/hybrid/GaussianMixtureFactor.cpp b/gtsam/hybrid/GaussianMixtureFactor.cpp
index 3df274db3..edf94d040 100644
--- a/gtsam/hybrid/GaussianMixtureFactor.cpp
+++ b/gtsam/hybrid/GaussianMixtureFactor.cpp
@@ -34,7 +34,7 @@ GaussianMixtureFactor::GaussianMixtureFactor(const KeyVector &continuousKeys,
 
 /* *******************************************************************************/
 bool GaussianMixtureFactor::equals(const HybridFactor &lf, double tol) const {
-  return false;
+  return Base::equals(lf, tol);
 }
 
 /* *******************************************************************************/
diff --git a/gtsam/hybrid/HybridConditional.cpp b/gtsam/hybrid/HybridConditional.cpp
index 5b3c9d7b4..ea83c5f86 100644
--- a/gtsam/hybrid/HybridConditional.cpp
+++ b/gtsam/hybrid/HybridConditional.cpp
@@ -89,7 +89,7 @@ void HybridConditional::print(const std::string &s,
 }
 
 bool HybridConditional::equals(const HybridFactor &other, double tol) const {
-  return false;
+  return BaseFactor::equals(other, tol);
 }
 
 }  // namespace gtsam
diff --git a/gtsam/hybrid/HybridFactor.cpp b/gtsam/hybrid/HybridFactor.cpp
index 1e9955c58..7a233bb1b 100644
--- a/gtsam/hybrid/HybridFactor.cpp
+++ b/gtsam/hybrid/HybridFactor.cpp
@@ -64,6 +64,10 @@ HybridFactor::HybridFactor(const DiscreteKeys &discreteKeys)
       isDiscrete_(true),
       discreteKeys_(discreteKeys) {}
 
+bool HybridFactor::equals(const HybridFactor &lf, double tol) const {
+  return Base::equals(lf, tol);
+}
+
 void HybridFactor::print(const std::string &s,
                          const KeyFormatter &formatter) const {
   std::cout << s;
diff --git a/gtsam/hybrid/HybridFactor.h b/gtsam/hybrid/HybridFactor.h
index 3d5bd7b21..c6e4a5ffa 100644
--- a/gtsam/hybrid/HybridFactor.h
+++ b/gtsam/hybrid/HybridFactor.h
@@ -85,7 +85,7 @@ class GTSAM_EXPORT HybridFactor : public Factor {
   /// @{
 
   /// equals
-  virtual bool equals(const HybridFactor &lf, double tol = 1e-9) const = 0;
+  virtual bool equals(const HybridFactor &lf, double tol = 1e-9) const;
 
   /// print
   void print(