diff --git a/src/MAKE/Makefile.mpi b/src/MAKE/Makefile.mpi
index 0155e8b3cbd99d0fe8710e76b9ae4b9d87ccc0d0..aebb465454c046f8e70387da3cf01ffe32a6597c 100644
--- a/src/MAKE/Makefile.mpi
+++ b/src/MAKE/Makefile.mpi
@@ -28,7 +28,7 @@ SHLIBFLAGS =	-shared
 # LAMMPS ifdef settings
 # see possible settings in Section 2.2 (step 4) of manual
 
-LMP_INC =	-DLAMMPS_GZIP
+LMP_INC =	-DLAMMPS_GZIP -DLAMMPS_MEMALIGN=64
 
 # MPI library
 # see discussion in Section 2.2 (step 5) of manual
diff --git a/src/MAKE/Makefile.serial b/src/MAKE/Makefile.serial
index 957bff85fff01d0cb24d8f4f2234f91e6609b777..5954d97761333e7978d9732f7020fa4f34a53bdf 100644
--- a/src/MAKE/Makefile.serial
+++ b/src/MAKE/Makefile.serial
@@ -28,7 +28,7 @@ SHLIBFLAGS =	-shared
 # LAMMPS ifdef settings
 # see possible settings in Section 2.2 (step 4) of manual
 
-LMP_INC =	-DLAMMPS_GZIP
+LMP_INC =	-DLAMMPS_GZIP -DLAMMPS_MEMALIGN=64
 
 # MPI library
 # see discussion in Section 2.2 (step 5) of manual