diff --git a/folly/portability/Time.h b/folly/portability/Time.h
index f51ff105b56..26e360f3dc7 100644
--- a/folly/portability/Time.h
+++ b/folly/portability/Time.h
@@ -36,6 +36,10 @@
 #define FOLLY_HAVE_CLOCK_GETTIME 1
 #define FOLLY_FORCE_CLOCK_GETTIME_DEFINITION 1
 
+#else
+
+#define FOLLY_FORCE_CLOCK_GETTIME_DEFINITION 0
+
 #endif
 
 // These aren't generic implementations, so we can only declare them on