Index: head/audio/bsequencer-lv2/Makefile
===================================================================
--- head/audio/bsequencer-lv2/Makefile
+++ head/audio/bsequencer-lv2/Makefile
@@ -15,7 +15,7 @@
 
 BUILD_DEPENDS=	lv2>0:audio/lv2
 
-USES=		gmake gnome pkgconfig
+USES=		compiler:c++11-lang gmake gnome pkgconfig
 USE_GITHUB=	yes
 GH_ACCOUNT=	sjaehn
 GH_PROJECT=	BSEQuencer
Index: head/audio/bsequencer-lv2/files/patch-src_BWidgets_ChoiceBox.cpp
===================================================================
--- head/audio/bsequencer-lv2/files/patch-src_BWidgets_ChoiceBox.cpp
+++ head/audio/bsequencer-lv2/files/patch-src_BWidgets_ChoiceBox.cpp
@@ -0,0 +1,10 @@
+--- src/BWidgets/ChoiceBox.cpp.orig	2019-07-25 10:03:27 UTC
++++ src/BWidgets/ChoiceBox.cpp
+@@ -16,6 +16,7 @@
+  */
+ 
+ #include "ChoiceBox.hpp"
++#include <sys/types.h>
+ 
+ namespace BWidgets
+ {
Index: head/audio/bsequencer-lv2/files/patch-src_BWidgets_ImageIcon.cpp
===================================================================
--- head/audio/bsequencer-lv2/files/patch-src_BWidgets_ImageIcon.cpp
+++ head/audio/bsequencer-lv2/files/patch-src_BWidgets_ImageIcon.cpp
@@ -0,0 +1,10 @@
+--- src/BWidgets/ImageIcon.cpp.orig	2019-07-25 10:05:26 UTC
++++ src/BWidgets/ImageIcon.cpp
+@@ -16,6 +16,7 @@
+  */
+ 
+ #include "ImageIcon.hpp"
++#include <sys/types.h>
+ 
+ namespace BWidgets
+ {
Index: head/audio/bsequencer-lv2/files/patch-src_BWidgets_ListBox.cpp
===================================================================
--- head/audio/bsequencer-lv2/files/patch-src_BWidgets_ListBox.cpp
+++ head/audio/bsequencer-lv2/files/patch-src_BWidgets_ListBox.cpp
@@ -0,0 +1,10 @@
+--- src/BWidgets/ListBox.cpp.orig	2019-07-25 10:08:28 UTC
++++ src/BWidgets/ListBox.cpp
+@@ -16,6 +16,7 @@
+  */
+ 
+ #include "ListBox.hpp"
++#include <sys/types.h>
+ 
+ namespace BWidgets
+ {