diff --git a/gtsam.h b/gtsam.h
index 071ababc8..c500de231 100644
--- a/gtsam.h
+++ b/gtsam.h
@@ -192,6 +192,7 @@ class SharedDiagonal {
 
 class SharedNoiseModel {
 #include <gtsam/linear/SharedGaussian.h>
+	// FIXME: this generates only one constructor
 	SharedNoiseModel(const SharedDiagonal& model);
 	SharedNoiseModel(const SharedGaussian& model);
 };