diff --git a/include/os/osTime.h b/include/os/osTime.h
index 88eabd206d..0a0a54119b 100644
--- a/include/os/osTime.h
+++ b/include/os/osTime.h
@@ -35,6 +35,7 @@ extern "C" {
 #ifdef WINDOWS
 
 #define CLOCK_REALTIME 0
+#define CLOCK_MONOTONIC 0
 
 #define MILLISECOND_PER_SECOND (1000i64)
 #else