diff --git a/src/crop.jl b/src/crop.jl
index f8fc40d..0491abb 100644
--- a/src/crop.jl
+++ b/src/crop.jl
@@ -120,7 +120,7 @@ function cropHighway!(nodes::Dict, bounds::Bounds, highway::Highway, valids::Bit
             if !(Geodesy.onBounds(prev_node, bounds) ||
                  Geodesy.onBounds(node, bounds))
                 new_node = Geodesy.boundaryPoint(prev_node, node, bounds)
-                new_id = addNewNode(nodes, new_node)
+                new_id = addNewNode!(nodes, new_node)
                 insert!(highway.nodes, ni + !valid, new_id)
                 ni += 1
             end
diff --git a/src/intersections.jl b/src/intersections.jl
index 70c7970..1040a51 100644
--- a/src/intersections.jl
+++ b/src/intersections.jl
@@ -162,7 +162,7 @@ function findIntersectionClusters( nodes::Dict{Int,ENU},
         if length(clusters_nodes[k]) > 1
             n = [clusters_nodes[k]...]
             c = centroid(nodes,n)
-            cluster_node_id = addNewNode(nodes,c)
+            cluster_node_id = addNewNode!(nodes,c)
 
             for j = 1:length(n)
                 cluster_map[n[j]] = cluster_node_id
diff --git a/src/nodes.jl b/src/nodes.jl
index 91a68df..5d69b50 100644
--- a/src/nodes.jl
+++ b/src/nodes.jl
@@ -69,9 +69,9 @@ function nodesWithinRange{T<:Union(ENU,ECEF)}(nodes::Dict{Int,T},
 end
 
 ### Add a new node ###
-function addNewNode{T<:Union(LLA,ENU)}(nodes::Dict{Int,T}, 
-                                       loc::T, 
-                                       start_id::Int=abs(int(hash(loc))) )
+function addNewNode!{T<:Union(LLA,ENU)}(nodes::Dict{Int,T}, 
+                                        loc::T, 
+                                        start_id::Int=abs(int(hash(loc))) )
     id = start_id
     while id <= typemax(Int)
         if !haskey(nodes, id)