diff --git a/gtsam/linear/GaussianConditional.h b/gtsam/linear/GaussianConditional.h
index 46365ff6b..ce6ad2a3a 100644
--- a/gtsam/linear/GaussianConditional.h
+++ b/gtsam/linear/GaussianConditional.h
@@ -144,9 +144,12 @@ public:
   /** equals function */
   bool equals(const GaussianConditional &cg, double tol = 1e-9) const;
 
-  /** dimension of multivariate variable */
+  /** dimension of multivariate variable (same as rows()) */
   size_t dim() const { return rsd_.rows(); }
 
+  /** dimension of multivariate variable (same as dim()) */
+  size_t rows() const { return dim(); }
+
   /** Compute the augmented information matrix as
    * \f$ [ R S d ]^T [ R S d ] \f$
    */