diff --git a/packages/games-strategy/freeorion/files/freeorion-0.4.7.1-Replace-use-of-boost-system-posix_error.patch b/packages/games-strategy/freeorion/files/freeorion-0.4.7.1-Replace-use-of-boost-system-posix_error.patch
new file mode 100644
index 00000000..140b8b49
--- /dev/null
+++ b/packages/games-strategy/freeorion/files/freeorion-0.4.7.1-Replace-use-of-boost-system-posix_error.patch
@@ -0,0 +1,43 @@
+Upstream: yes
+Reason: Fix build with boost[>=1.66.0]
+
+From c9b5b13fb81b1ed142dee0e843101c6b8832ca95 Mon Sep 17 00:00:00 2001
+From: D Benage <dbenage.cx@gmail.com>
+Date: Wed, 13 Dec 2017 18:53:55 -0600
+Subject: [PATCH] Replace use of boost::system::posix_error
+
+First deprecated in boost v1.37
+---
+ GG/src/dialogs/FileDlg.cpp | 2 +-
+ UI/ClientUI.cpp            | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/GG/src/dialogs/FileDlg.cpp b/GG/src/dialogs/FileDlg.cpp
+index 9032aee58..17b923233 100644
+--- a/GG/src/dialogs/FileDlg.cpp
++++ b/GG/src/dialogs/FileDlg.cpp
+@@ -746,7 +746,7 @@ void FileDlg::OpenDirectory()
+             try {
+                 SetWorkingDirectory(fs::path(directory + "\\"));
+             } catch (const fs::filesystem_error& e) {
+-                if (e.code() == boost::system::posix_error::io_error) {
++                if (e.code() == boost::system::errc::io_error) {
+                     m_in_win32_drive_selection = true;
+                     m_files_edit->Clear();
+                     FilesEditChanged(m_files_edit->Text());
+diff --git a/UI/ClientUI.cpp b/UI/ClientUI.cpp
+index f294e9116..f9709ad4e 100644
+--- a/UI/ClientUI.cpp
++++ b/UI/ClientUI.cpp
+@@ -1136,7 +1136,7 @@ ClientUI::TexturesAndDist ClientUI::PrefixedTexturesAndDist(const boost::filesys
+                     textures.push_back(ClientUI::GetTexture(*it, mipmap));
+             } catch (const fs::filesystem_error& e) {
+                 // ignore files for which permission is denied, and rethrow other exceptions
+-                if (e.code() != boost::system::posix_error::permission_denied)
++                if (e.code() != boost::system::errc::permission_denied)
+                     throw;
+             }
+         }
+-- 
+2.17.0
+
diff --git a/packages/games-strategy/freeorion/freeorion-0.4.7.1-r1.exheres-0 b/packages/games-strategy/freeorion/freeorion-0.4.7.1-r1.exheres-0
index 9af8cc75..4ad01047 100644
--- a/packages/games-strategy/freeorion/freeorion-0.4.7.1-r1.exheres-0
+++ b/packages/games-strategy/freeorion/freeorion-0.4.7.1-r1.exheres-0
@@ -46,6 +46,10 @@ DEPENDENCIES="
 
 BUGS_TO="hasufell@posteo.de"
 
+DEFAULT_SRC_PREPARE_PATCHES=(
+    "${FILES}"/${PNV}-Replace-use-of-boost-system-posix_error.patch
+)
+
 CMAKE_SRC_CONFIGURE_PARAMS=(
     -DRELEASE_COMPILE_FLAGS=""
     -DCMAKE_SKIP_RPATH=ON