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-rw-r--r--test/ntypes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/ntypes.c b/test/ntypes.c
index f1d2449..34558f5 100644
--- a/test/ntypes.c
+++ b/test/ntypes.c
@@ -2484,7 +2484,7 @@ test_opaque_dtype(hid_t file)
TEST_ERROR;
for(i = 0; i < sizeof(wbuf); i++)
- wbuf[i] = (unsigned char)(0xff ^ i);
+ wbuf[i] = (unsigned char)0xff ^ (unsigned char)i;
if(H5Dwrite(dset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, wbuf) < 0) TEST_ERROR;
if(H5Sclose(space) < 0) TEST_ERROR;