diff --git a/AK/Platform.h b/AK/Platform.h
index 1b02a3b5000..440490c0b3f 100644
--- a/AK/Platform.h
+++ b/AK/Platform.h
@@ -34,6 +34,15 @@
 #    define AK_ARCH_X86_64 1
 #endif
 
+#if defined(__APPLE__) && defined(__MACH__)
+#    define AK_OS_MACOS
+#    define AK_OS_BSD_GENERIC
+#endif
+
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#    define AK_OS_BSD_GENERIC
+#endif
+
 #define ARCH(arch) (defined(AK_ARCH_##arch) && AK_ARCH_##arch)
 
 #ifdef ALWAYS_INLINE
@@ -88,4 +97,9 @@ ALWAYS_INLINE int count_trailing_zeroes_32(unsigned int val)
     }
     return 0;
 #endif
+
+#ifdef AK_OS_BSD_GENERIC
+#    define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
+#    define CLOCK_REALTIME_COARSE CLOCK_REALTIME
+#endif
 }
diff --git a/AK/Time.h b/AK/Time.h
index a919f36f5e2..8741d999e88 100644
--- a/AK/Time.h
+++ b/AK/Time.h
@@ -26,6 +26,8 @@
 
 #pragma once
 
+#include <AK/Platform.h>
+
 namespace AK {
 
 // Month and day start at 1. Month must be >= 1 and <= 12.