diff --git a/intern/cycles/util/util_function.h b/intern/cycles/util/util_function.h
index 33e15939712..6d0f0b444a9 100644
--- a/intern/cycles/util/util_function.h
+++ b/intern/cycles/util/util_function.h
@@ -28,11 +28,7 @@ CCL_NAMESPACE_BEGIN
 
 #if (__cplusplus > 199711L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
 #  define function_bind std::bind
-#  ifdef _MSC_VER
-#    define function_null nullptr
-#  else
-#    define function_null NULL
-#endif
+#  define function_null nullptr
 using std::function;
 using std::placeholders::_1;
 using std::placeholders::_2;