diff --git a/gtsam/slam/planarSLAM.h b/gtsam/slam/planarSLAM.h
index 024b2f8ff..f400b54f3 100644
--- a/gtsam/slam/planarSLAM.h
+++ b/gtsam/slam/planarSLAM.h
@@ -58,11 +58,16 @@ namespace gtsam {
 				TupleValues2<PoseValues, PointValues>(values) {
 			}
 
-			/// Copy constructor - FIXME: shouldn't need to exist
+			/// Copy constructor
 			Values(const TupleValues2<PoseValues, PointValues>::Base& values) :
 				TupleValues2<PoseValues, PointValues>(values) {
 			}
 
+			/// From sub-values
+			Values(const PoseValues& poses, const PointValues& points) :
+				TupleValues2<PoseValues, PointValues>(poses, points) {
+			}
+
 			// Convenience for MATLAB wrapper, which does not allow for identically named methods
 
 			/// insert a pose