diff --git a/src/external/SMIOL/smiol.c b/src/external/SMIOL/smiol.c
index 8a34ed23bb..4f5ee9d9c8 100644
--- a/src/external/SMIOL/smiol.c
+++ b/src/external/SMIOL/smiol.c
@@ -12,6 +12,7 @@
 #define PNETCDF_DEFINE_MODE 0
 #define PNETCDF_DATA_MODE 1
 #define MAX_REQS 256
+#define PNETCDF_HEADER_ALIGN_SIZE_STR "131072"
 #endif
 
 #define START_COUNT_READ 0
@@ -243,6 +244,7 @@ int SMIOL_open_file(struct SMIOL_context *context, const char *filename,
 	int io_group;
 	MPI_Comm io_file_comm;
 	MPI_Comm io_group_comm;
+	MPI_Info info = MPI_INFO_NULL;
 	int ierr;
 
 
@@ -336,11 +338,13 @@ int SMIOL_open_file(struct SMIOL_context *context, const char *filename,
 				MPI_Comm_free(&io_group_comm);
 				return SMIOL_INVALID_FORMAT;
 			}
-
+            MPI_Info_create(&info);
+            MPI_Info_set(info, "nc_header_align_size", PNETCDF_HEADER_ALIGN_SIZE_STR);
 			ierr = ncmpi_create(io_file_comm, filename,
 			                    (filecmode | NC_CLOBBER),
-			                    MPI_INFO_NULL,
+			                    info,
 			                    &((*file)->ncidp));
+			MPI_Info_free(&info);
 		}
 		(*file)->state = PNETCDF_DEFINE_MODE;
 #endif
@@ -348,7 +352,7 @@ int SMIOL_open_file(struct SMIOL_context *context, const char *filename,
 #ifdef SMIOL_PNETCDF
 		if ((*file)->io_task) {
 			ierr = ncmpi_open(io_file_comm, filename,
-			                  NC_WRITE, MPI_INFO_NULL,
+			                  NC_WRITE, info,
 			                  &((*file)->ncidp));
 		}
 		(*file)->state = PNETCDF_DATA_MODE;
@@ -357,7 +361,7 @@ int SMIOL_open_file(struct SMIOL_context *context, const char *filename,
 #ifdef SMIOL_PNETCDF
 		if ((*file)->io_task) {
 			ierr = ncmpi_open(io_file_comm, filename,
-			                  NC_NOWRITE, MPI_INFO_NULL,
+			                  NC_NOWRITE, info,
 			                  &((*file)->ncidp));
 		}
 		(*file)->state = PNETCDF_DATA_MODE;