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-rw-r--r--release_docs/RELEASE.txt3
-rw-r--r--src/H5S.c4
2 files changed, 5 insertions, 2 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 2049ac8..4ed8cbe 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -181,6 +181,9 @@ Documentation
New Features
============
+ * Enable MPI type support for collective I/O to be enabled by default.
+ This can be disabled by setting the HDF5_MPI_OPT_TYPES environment
+ variable to the value "0". QAK - 2002/06/14
* Allow chunks in chunked datasets to be cached when file is opened for
read-only access (bug #709). QAK - 2002/06/10
* Added internal "small data" aggregation, which can reduce the number of
diff --git a/src/H5S.c b/src/H5S.c
index 3db039c..bf8cf51 100644
--- a/src/H5S.c
+++ b/src/H5S.c
@@ -41,8 +41,8 @@ static size_t H5S_aconv_g = 0; /*entries allocated*/
static size_t H5S_nconv_g = 0; /*entries used*/
#ifdef H5_HAVE_PARALLEL
-/* Global var whose value comes from environment variable */
-hbool_t H5_mpi_opt_types_g = FALSE;
+/* Global var whose value can be set from environment variable also */
+hbool_t H5_mpi_opt_types_g = TRUE;
#endif
/* Declare a free list to manage the H5S_simple_t struct */