diff --git a/src/definitions.jl b/src/definitions.jl
index a8b649b..fee48c1 100644
--- a/src/definitions.jl
+++ b/src/definitions.jl
@@ -30,6 +30,8 @@ macro primitives()
                    import HierarchicalUtils: NodeType, LeafNode
                    NodeType(::Type{<:Number}) = LeafNode()
                    NodeType(::Type{<:AbstractString}) = LeafNode()
+                   NodeType(::Type{<:Symbol}) = LeafNode()
+                   NodeType(::Type{<:AbstractChar}) = LeafNode()
                    return
                end
               )