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-rw-r--r--src/H5SMcache.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/H5SMcache.c b/src/H5SMcache.c
index 49ce2b4..ee28fa4 100644
--- a/src/H5SMcache.c
+++ b/src/H5SMcache.c
@@ -397,7 +397,7 @@ H5SM__cache_table_serialize(const H5F_t *f, void *_image, size_t len,
*image++ = H5SM_LIST_VERSION;
/* Is message index a list or a B-tree? */
- *image++ = table->indexes[u].index_type;
+ *image++ = (uint8_t)table->indexes[u].index_type;
/* Type of messages in the index */
UINT16ENCODE(image, table->indexes[u].mesg_types);