diff --git a/timing/timeSFMBAL.cpp b/timing/timeSFMBAL.cpp
index 218bfe18e..68b3c4932 100644
--- a/timing/timeSFMBAL.cpp
+++ b/timing/timeSFMBAL.cpp
@@ -34,7 +34,7 @@
 using namespace std;
 using namespace gtsam;
 
-//#define USE_GTSAM_FACTOR
+#define USE_GTSAM_FACTOR
 #ifdef USE_GTSAM_FACTOR
 #include <gtsam/slam/GeneralSFMFactor.h>
 #include <gtsam/geometry/Cal3Bundler.h>