1 files changed, 6 insertions, 1 deletions
diff --git a/src/H5FDpublic.h b/src/H5FDpublic.h
index 87edf50..452de02 100644
--- a/src/H5FDpublic.h
+++ b/src/H5FDpublic.h
@@ -234,7 +234,12 @@ typedef enum H5F_mem_t	H5FD_mem_t;
      * image to store in memory.
      */
 #define H5FD_FEAT_CAN_USE_FILE_IMAGE_CALLBACKS 0x00000800
-
+    /*
+     * Defining the H5FD_FEAT_HAS_MPI_ATOMICITY for a VFL driver means
+     * that the driver is able to do atomic read/write operations as
+     * defined by MPI atomicity semantics.
+     */
+#define H5FD_FEAT_HAS_MPI_ATOMICITY    0x00001000
 
 /* Forward declaration */
 typedef struct H5FD_t H5FD_t;