diff --git a/src/EGraphs/egraph.jl b/src/EGraphs/egraph.jl
index a4f0e5f3..2609da02 100644
--- a/src/EGraphs/egraph.jl
+++ b/src/EGraphs/egraph.jl
@@ -273,7 +273,7 @@ function add!(g::EGraph{ExpressionType,Analysis}, n::VecExpr, should_copy::Bool)
   g.memo[n] = id
 
   add_class_by_op(g, n, id)
-  eclass = EClass{Analysis}(id, VecExpr[copy(n)], Pair{VecExpr,Id}[], make(g, n))
+  eclass = EClass{Analysis}(id, VecExpr[n], Pair{VecExpr,Id}[], make(g, n))
   g.classes[IdKey(id)] = eclass
   modify!(g, eclass)
   push!(g.pending, n => id)