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-rw-r--r--sys-utils/rtcwake.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/sys-utils/rtcwake.c b/sys-utils/rtcwake.c
index 0caab24da..2fcb5ffa7 100644
--- a/sys-utils/rtcwake.c
+++ b/sys-utils/rtcwake.c
@@ -43,10 +43,9 @@
#include "closestream.h"
#include "timeutils.h"
-/* constants from legacy PC/AT hardware */
-#define RTC_PF 0x40
-#define RTC_AF 0x20
-#define RTC_UF 0x10
+#ifndef RTC_AF
+# define RTC_AF 0x20 /* Alarm interrupt */
+#endif
#define ADJTIME_ZONE_STRLEN 8