diff --git a/gtsam/hybrid/GaussianMixtureFactor.h b/gtsam/hybrid/GaussianMixtureFactor.h
index 6c90ee6a7..7b7c1899f 100644
--- a/gtsam/hybrid/GaussianMixtureFactor.h
+++ b/gtsam/hybrid/GaussianMixtureFactor.h
@@ -108,7 +108,7 @@ class GTSAM_EXPORT GaussianMixtureFactor : public HybridFactor {
   bool equals(const HybridFactor &lf, double tol = 1e-9) const override;
 
   void print(
-      const std::string &s = "HybridFactor\n",
+      const std::string &s = "GaussianMixtureFactor\n",
       const KeyFormatter &formatter = DefaultKeyFormatter) const override;
   /// @}