diff --git a/gtsam/hybrid/HybridGaussianProductFactor.h b/gtsam/hybrid/HybridGaussianProductFactor.h
index 17d9238dd7..ab15fee303 100644
--- a/gtsam/hybrid/HybridGaussianProductFactor.h
+++ b/gtsam/hybrid/HybridGaussianProductFactor.h
@@ -58,7 +58,10 @@ class GTSAM_EXPORT HybridGaussianProductFactor
   /// Deleted constructor since we don't have istream operator for
   /// GaussianFactorGraphValuePair
   HybridGaussianProductFactor(const std::vector<DiscreteKey>& labelCs,
-                              const std::string& table) = delete;
+                              const std::string& table) {
+    throw std::runtime_error(
+        "HybridGaussianProductFactor: No way to construct.");
+  }
 
   ///@}