diff --git a/srcpkgs/wesnoth/patches/boost-1.69.patch b/srcpkgs/wesnoth/patches/boost-1.69.patch
new file mode 100644
index 00000000000..ac9e69f7619
--- /dev/null
+++ b/srcpkgs/wesnoth/patches/boost-1.69.patch
@@ -0,0 +1,43 @@
+From f6a32792d023d182d350b5a2ed9e469ad67484c8 Mon Sep 17 00:00:00 2001
+From: Wedge009 <wedge009@wedge009.net>
+Date: Thu, 27 Dec 2018 08:15:10 +1100
+Subject: [PATCH] Use explicit casts to accommodate changes to boost's tribool
+ in 1.69.
+
+(fixes #3646)
+---
+ src/units/frame.cpp | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git src/units/frame.cpp src/units/frame.cpp
+index 3215fa4fa79d..6370ad69566b 100644
+--- src/units/frame.cpp
++++ src/units/frame.cpp
+@@ -460,15 +460,15 @@ std::vector<std::string> frame_parsed_parameters::debug_strings() const
+ 	}
+ 
+ 	if(!boost::indeterminate(auto_vflip_)) {
+-		v.emplace_back("auto_vflip=" + utils::bool_string(auto_vflip_));
++		v.emplace_back("auto_vflip=" + utils::bool_string(static_cast<bool>(auto_vflip_)));
+ 	}
+ 
+ 	if(!boost::indeterminate(auto_hflip_)) {
+-		v.emplace_back("auto_hflip=" + utils::bool_string(auto_hflip_));
++		v.emplace_back("auto_hflip=" + utils::bool_string(static_cast<bool>(auto_hflip_)));
+ 	}
+ 
+ 	if(!boost::indeterminate(primary_frame_)) {
+-		v.emplace_back("primary_frame=" + utils::bool_string(primary_frame_));
++		v.emplace_back("primary_frame=" + utils::bool_string(static_cast<bool>(primary_frame_)));
+ 	}
+ 
+ 	if(!drawing_layer_.get_original().empty()) {
+@@ -768,7 +768,7 @@ const frame_parameters unit_frame::merge_parameters(int current_time, const fram
+ 	}
+ 
+ 	// Convert the tribool to bool
+-	const bool primary = result.primary_frame == true || boost::logic::indeterminate(result.primary_frame);
++	const bool primary = static_cast<bool>(result.primary_frame) || boost::logic::indeterminate(result.primary_frame);
+ 
+ 	/** The engine provides a default image to use for the unit when none is available */
+ 	result.image = current_val.image.is_void() || current_val.image.get_filename().empty()
diff --git a/srcpkgs/wesnoth/template b/srcpkgs/wesnoth/template
index 78fe5710e07..ec79af86e0b 100644
--- a/srcpkgs/wesnoth/template
+++ b/srcpkgs/wesnoth/template
@@ -1,7 +1,7 @@
 # Template file for 'wesnoth'
 pkgname=wesnoth
 version=1.14.5
-revision=3
+revision=4
 build_style=cmake
 configure_args="-DENABLE_OMP=1"
 hostmakedepends="pkg-config"