diff --git a/source/lmp/pair_deepmd.cpp b/source/lmp/pair_deepmd.cpp
index c5dc8ecb48..027b42825b 100644
--- a/source/lmp/pair_deepmd.cpp
+++ b/source/lmp/pair_deepmd.cpp
@@ -460,7 +460,6 @@ void PairDeepMD::compute(int eflag, int vflag) {
                "centroid/stress/atom command for 9-element atomic virial.");
   }
   bool do_ghost = true;
-  assert(sizeof(MPI_Comm) == sizeof(int));
   //  dpa2 communication
   commdata_ = (CommBrickDeepMD *)comm;
   double **x = atom->x;