diff --git a/intern/cycles/util/util_task.h b/intern/cycles/util/util_task.h
index c3bc14348be..a56ca62f62c 100644
--- a/intern/cycles/util/util_task.h
+++ b/intern/cycles/util/util_task.h
@@ -19,11 +19,10 @@
 
 #include "util/util_list.h"
 #include "util/util_string.h"
+#include "util/util_tbb.h"
 #include "util/util_thread.h"
 #include "util/util_vector.h"
 
-#include "util/util_tbb.h"
-
 CCL_NAMESPACE_BEGIN
 
 class TaskPool;
diff --git a/intern/cycles/util/util_tbb.h b/intern/cycles/util/util_tbb.h
index 7a3dacb3a9d..301cb80c5b0 100644
--- a/intern/cycles/util/util_tbb.h
+++ b/intern/cycles/util/util_tbb.h
@@ -17,6 +17,10 @@
 #ifndef __UTIL_TBB_H__
 #define __UTIL_TBB_H__
 
+/* TBB includes <windows.h>, do it ourselves first so we are sure
+ * WIN32_LEAN_AND_MEAN and similar are defined beforehand. */
+#include "util_windows.h"
+
 #define TBB_SUPPRESS_DEPRECATED_MESSAGES 1
 #include <tbb/tbb.h>