diff --git a/gtsam/base/LieScalar.h b/gtsam/base/LieScalar.h
index 2ed81b1df..750a8a21f 100644
--- a/gtsam/base/LieScalar.h
+++ b/gtsam/base/LieScalar.h
@@ -115,12 +115,16 @@ namespace gtsam {
   // Define GTSAM traits
   namespace traits {
 
+  template<>
+  struct is_group<LieScalar> : public std::true_type {
+  };
+
   template<>
   struct is_manifold<LieScalar> : public std::true_type {
   };
 
   template<>
-  struct dimension<LieScalar> : public Dynamic {
+  struct dimension<LieScalar> : public std::integral_constant<int, 1> {
   };
 
   }