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-rw-r--r--emulators/rtc/files/rtc.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/emulators/rtc/files/rtc.h b/emulators/rtc/files/rtc.h
index d3a151e286e5..36fe9083e951 100644
--- a/emulators/rtc/files/rtc.h
+++ b/emulators/rtc/files/rtc.h
@@ -5,5 +5,9 @@
#define RTCIO_PIE_ON _IO('p', 0x05)
#define RTCIO_IRQP_SET _IO('p', 0x0c)
+#ifndef M_WAITOK
+#define M_WAITOK 0x0000
+#endif
+
#endif /* RTC_H */