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-rw-r--r--src/H5system.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/H5system.c b/src/H5system.c
index 7b3a0eb..719b7e0 100644
--- a/src/H5system.c
+++ b/src/H5system.c
@@ -1043,7 +1043,7 @@ H5_build_extpath(const char *name, char **extpath /*out*/)
* Unix: does not apply
*/
if(H5_CHECK_ABS_DRIVE(name)) {
- drive = toupper(name[0]) - 'A' + 1;
+ drive = HDtoupper(name[0]) - 'A' + 1;
retcwd = HDgetdcwd(drive, cwdpath, MAX_PATH_LEN);
HDstrncpy(new_name, &name[2], name_len);
} /* end if */