diff --git a/fix-return-values.diff b/fix-return-values.diff
new file mode 100644
index 0000000..b370c02
--- /dev/null
+++ b/fix-return-values.diff
@@ -0,0 +1,20 @@
+--- src/logic/expedition_bootstrap.cc.orig	2014-02-25 18:23:49.184906307 +0100
++++ src/logic/expedition_bootstrap.cc	2014-02-25 18:24:11.959906892 +0100
+@@ -180,6 +180,7 @@
+ 		}
+ 	}
+ 	assert(false); // Never here, otherwise we do not have a queue for this ware.
++        return NULL;
+ }
+ 
+ std::vector<WaresQueue*> ExpeditionBootstrap::wares() const {
+--- src/scripting/lua_map.cc.orig	2014-02-25 18:24:39.048907588 +0100
++++ src/scripting/lua_map.cc	2014-02-25 18:24:51.019907895 +0100
+@@ -82,6 +82,7 @@
+ 			return CAST_TO_LUA(Ship);
+ 	}
+ 	assert(false);  // Never here, hopefully.
++        return 0;
+ }
+ int upcasted_immovable_to_lua(lua_State * L, BaseImmovable * mo) {
+ 	if (!mo)
diff --git a/widelands.spec b/widelands.spec
index 8e4cc94..5b924ae 100644
--- a/widelands.spec
+++ b/widelands.spec
@@ -27,6 +27,7 @@ Group:          Amusements/Games/Strategy/Other
 Url:            http://www.widelands.org
 Source0:        %{name}-%{version}-src.tar.bz2
 Source1:        %{name}.desktop
+Patch1:         fix-return-values.diff
 BuildRequires:  SDL_gfx-devel
 BuildRequires:  SDL_image-devel
 BuildRequires:  SDL_mixer-devel
@@ -78,6 +79,7 @@ Data files for Widelands. Including localization, maps graphics and music.
 
 %prep
 %setup -q -n %{name}-%{version}-src
+%patch1
 %if %build_launchpad
 # for launchpad translation update
 cd ..