diff --git a/AK/Platform.h b/AK/Platform.h
index 4c93789d289..c2fe8deee31 100644
--- a/AK/Platform.h
+++ b/AK/Platform.h
@@ -233,7 +233,7 @@
 #    define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
 #endif
 
-#if defined(AK_OS_BSD_GENERIC) && !defined(AK_OS_FREEBSD)
+#if defined(AK_OS_BSD_GENERIC) && !defined(AK_OS_FREEBSD) || defined(AK_OS_HAIKU)
 #    define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
 #    define CLOCK_REALTIME_COARSE CLOCK_REALTIME
 #endif