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-rw-r--r--src/H5win32defs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/H5win32defs.h b/src/H5win32defs.h
index 88911b0..3718121 100644
--- a/src/H5win32defs.h
+++ b/src/H5win32defs.h
@@ -101,6 +101,7 @@ H5_DLL int H5_get_win32_times(H5_timevals_t *tvs);
#define HDgettimeofday(V, Z) Wgettimeofday(V, Z)
#define HDsetenv(N, V, O) Wsetenv(N, V, O)
+#define HDunsetenv(N, V, O) Wsetenv(N, "", 1)
#define HDflock(F, L) Wflock(F, L)
#define HDgetlogin() Wgetlogin()