diff --git a/src/coloring/acyclic_coloring.jl b/src/coloring/acyclic_coloring.jl
index 0eedd38f..b3e52d44 100644
--- a/src/coloring/acyclic_coloring.jl
+++ b/src/coloring/acyclic_coloring.jl
@@ -192,7 +192,7 @@ function find(w::Integer,
               g::LightGraphs.AbstractGraph,
               two_colored_forest::DisjointSets{<:Integer})
     edge_index = find_edge_index(w, x, g)
-    return find_root(two_colored_forest, edge_index)
+    return find_root!(two_colored_forest, edge_index)
 end