diff --git a/graphics/py-open3d-python/Makefile b/graphics/py-open3d-python/Makefile
index e929148852ca..0d140c3b4aac 100644
--- a/graphics/py-open3d-python/Makefile
+++ b/graphics/py-open3d-python/Makefile
@@ -31,7 +31,7 @@ LDFLAGS+=	-pthread # https://github.com/IntelVCL/Open3D/issues/510
 
 PLIST_FILES=	${PYTHON_SITELIBDIR}/open3d.so
 
-.if !exists(/usr/include/c++/v1/tr1/experimental/optional)
+.if !exists(/usr/include/c++/v1/experimental/optional)
 BROKEN=		Base C++ compiler is missing the header <experimental/optional>, see bug\#249538
 .endif