diff --git a/games-strategy/widelands/files/widelands-0.20-boost-1.73.patch b/games-strategy/widelands/files/widelands-0.20-boost-1.73.patch
new file mode 100644
index 0000000000000..99a8c51190b2d
--- /dev/null
+++ b/games-strategy/widelands/files/widelands-0.20-boost-1.73.patch
@@ -0,0 +1,22 @@
+--- a/src/editor/ui_menus/categorized_item_selection_menu.h
++++ b/src/editor/ui_menus/categorized_item_selection_menu.h
+@@ -124,7 +124,7 @@
+ 
+ 			UI::Checkbox* cb = create_checkbox(horizontal, descriptions_.get(i));
+ 			cb->set_state(tool_->is_enabled(i));
+-			cb->changedto.connect(boost::bind(&CategorizedItemSelectionMenu::selected, this, i, _1));
++			cb->changedto.connect(boost::bind(&CategorizedItemSelectionMenu::selected, this, i, boost::placeholders::_1));
+ 			checkboxes_[i] = cb;
+ 			horizontal->add(cb);
+ 			horizontal->add_space(kSpacing);
+--- a/src/ui_basic/box.cc
++++ b/src/ui_basic/box.cc
+@@ -104,7 +104,7 @@
+ 	int maxbreadth = mindesiredbreadth_;
+ 
+ 	for (uint32_t idx = 0; idx < items_.size(); ++idx) {
+-		int depth, breadth = 0;
++		int depth = 0, breadth = 0;
+ 		get_item_desired_size(idx, &depth, &breadth);
+ 
+ 		totaldepth += depth;
diff --git a/games-strategy/widelands/widelands-0.20-r1.ebuild b/games-strategy/widelands/widelands-0.20-r1.ebuild
index 14a80be7f6ce9..c0629174bc753 100644
--- a/games-strategy/widelands/widelands-0.20-r1.ebuild
+++ b/games-strategy/widelands/widelands-0.20-r1.ebuild
@@ -43,8 +43,9 @@ CMAKE_BUILD_TYPE="Release"
 S="${WORKDIR}/${MY_P}"
 
 PATCHES=(
-	"${FILESDIR}/${PN}-0.20_rc1-cxxflags.patch"
-	"${FILESDIR}/${PN}-0.20-glvnd.patch"
+	"${FILESDIR}"/${PN}-0.20_rc1-cxxflags.patch
+	"${FILESDIR}"/${PN}-0.20-glvnd.patch
+	"${FILESDIR}"/${PN}-0.20-boost-1.73.patch
 )
 
 src_prepare() {