diff --git a/gtsam/geometry/Cal3.h b/gtsam/geometry/Cal3.h
index 74c9868f3..08ce4c1e6 100644
--- a/gtsam/geometry/Cal3.h
+++ b/gtsam/geometry/Cal3.h
@@ -99,6 +99,9 @@ class GTSAM_EXPORT Cal3 {
    */
   Cal3(double fov, int w, int h);
 
+  /// Virtual destructor
+  virtual ~Cal3() {}
+
   /// @}
   /// @name Advanced Constructors
   /// @{