diff --git a/gtsam/slam/tests/testGeneralSFMFactor_Cal3Bundler.cpp b/gtsam/slam/tests/testGeneralSFMFactor_Cal3Bundler.cpp
index 1b1ae5390..21f5f2008 100644
--- a/gtsam/slam/tests/testGeneralSFMFactor_Cal3Bundler.cpp
+++ b/gtsam/slam/tests/testGeneralSFMFactor_Cal3Bundler.cpp
@@ -366,7 +366,7 @@ TEST( GeneralSFMFactor_Cal3Bundler, optimize_varK_BA ) {
   }
 
   // Constrain position of system with the first camera constrained to the origin
-  graph.addCameraConstraint(X(0), cameras[0]);
+  graph.addCameraConstraint(0, cameras[0]);
 
   // Constrain the scale of the problem with a soft range factor of 1m between the cameras
   graph.add(RangeFactor<GeneralCamera,GeneralCamera>(X(0), X(1), 2.0, noiseModel::Isotropic::Sigma(1, 10.0)));