diff --git a/gtsam_unstable/nonlinear/expressions.h b/gtsam_unstable/nonlinear/expressions.h
index 18f05e441..eba85c33c 100644
--- a/gtsam_unstable/nonlinear/expressions.h
+++ b/gtsam_unstable/nonlinear/expressions.h
@@ -1,7 +1,7 @@
 /**
  * @file expressions.h
  * @brief Common expressions, both linear and non-linear
- * @date Oct 1, 2014
+ * @date Nov 23, 2014
  * @author Frank Dellaert
  */
 
@@ -20,6 +20,7 @@ Expression<T> between(const Expression<T>& t1, const Expression<T>& t2) {
 }
 
 typedef Expression<double> double_;
+typedef Expression<Vector3> Vector3_;
 
 } // \namespace gtsam
 
diff --git a/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp b/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp
index c63bfeb6f..ea258dc05 100644
--- a/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp
+++ b/gtsam_unstable/nonlinear/tests/testExpressionFactor.cpp
@@ -22,8 +22,6 @@
 #include <gtsam/slam/GeneralSFMFactor.h>
 #include <gtsam/slam/ProjectionFactor.h>
 #include <gtsam/slam/PriorFactor.h>
-#include <gtsam/geometry/Pose3.h>
-#include <gtsam/geometry/Cal3_S2.h>
 #include <gtsam/base/Testable.h>
 
 #include <CppUnitLite/TestHarness.h>