diff --git a/p_space_3body_resonance.jl b/p_space_3body_resonance.jl
index bc2897c..c897e7a 100644
--- a/p_space_3body_resonance.jl
+++ b/p_space_3body_resonance.jl
@@ -1,6 +1,7 @@
 using LinearAlgebra, SparseArrays, Arpack
 include("helper.jl")
 include("p_space.jl")
+include("ho_basis.jl")
 
 println("No of threads = ", Threads.nthreads())
 atol = 10^-5