diff --git a/modules/flann/include/opencv2/flann/dist.h b/modules/flann/include/opencv2/flann/dist.h
index ceb83543f5..ab78b253ef 100644
--- a/modules/flann/include/opencv2/flann/dist.h
+++ b/modules/flann/include/opencv2/flann/dist.h
@@ -77,6 +77,8 @@ struct Accumulator<short>  { typedef float Type; };
 template<>
 struct Accumulator<int> { typedef float Type; };
 
+#undef True
+#undef False
 
 class True
 {