diff --git a/lib/LibHYPRE.jl b/lib/LibHYPRE.jl
index 522d5af..08bbfa7 100644
--- a/lib/LibHYPRE.jl
+++ b/lib/LibHYPRE.jl
@@ -2,8 +2,9 @@ using HYPRE_jll
 export HYPRE_jll
 
 using CEnum
+using MPI
 
-const MPI_Comm = Cint
+const MPI_Comm = MPI.MPI_Comm
 
 const MPI_Op = Cint
 
diff --git a/test/runtests.jl b/test/runtests.jl
index 22079e5..b6baa88 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -10,8 +10,6 @@ using SparseArrays
 using SparseMatricesCSR
 using Test
 
-Base.convert(::Type{Int32}, comm::MPI.Comm) = comm.val
-
 # Init HYPRE and MPI
 HYPRE.Init()