diff --git a/extern/carve/bundle.sh b/extern/carve/bundle.sh
index cbc1fe6d2d5..3f9028619a5 100755
--- a/extern/carve/bundle.sh
+++ b/extern/carve/bundle.sh
@@ -114,7 +114,8 @@ incs = ['include']
 if env['WITH_BF_BOOST']:
     if env['OURPLATFORM'] not in ('win32-vc', 'win64-vc'):
         # Boost is setting as preferred collections library in the Carve code when using MSVC compiler
-        defs.append('HAVE_BOOST_UNORDERED_COLLECTIONS')
+        if env['OURPLATFORM'] != 'win32-mingw':
+            defs.append('HAVE_BOOST_UNORDERED_COLLECTIONS')
 
     defs.append('CARVE_SYSTEM_BOOST')
     incs.append(env['BF_BOOST_INC'])
diff --git a/extern/carve/patches/gcc46.patch b/extern/carve/patches/gcc46.patch
new file mode 100644
index 00000000000..a8384dcdab8
--- /dev/null
+++ b/extern/carve/patches/gcc46.patch
@@ -0,0 +1,11 @@
+diff -r 525472fb477a include/carve/polyline_iter.hpp
+--- a/include/carve/polyline_iter.hpp	Sun Jan 15 23:07:40 2012 -0500
++++ b/include/carve/polyline_iter.hpp	Wed Jan 18 00:41:13 2012 +0600
+@@ -20,6 +20,7 @@
+ #include <list>
+ #include <iterator>
+ #include <limits>
++#include <cstddef>
+ 
+ #include <carve/polyline_decl.hpp>
+ 
diff --git a/extern/carve/patches/mingw.patch b/extern/carve/patches/mingw.patch
new file mode 100644
index 00000000000..c237edf18e9
--- /dev/null
+++ b/extern/carve/patches/mingw.patch
@@ -0,0 +1,15 @@
+diff -r 525472fb477a include/carve/win32.h
+--- a/include/carve/win32.h	Sun Jan 15 23:07:40 2012 -0500
++++ b/include/carve/win32.h	Wed Jan 18 00:40:10 2012 +0600
+@@ -8,9 +8,11 @@
+ #include <string.h>
+ #include <stdlib.h>
+ 
++#if !defined(__MINGW32__)
+ inline int strcasecmp(const char *a, const char *b) {
+   return _stricmp(a,b);
+ }
++#endif
+ 
+ inline void srandom(unsigned long input) {
+   srand(input);
diff --git a/extern/carve/patches/series b/extern/carve/patches/series
index 6e2a36a0576..585d90659bd 100644
--- a/extern/carve/patches/series
+++ b/extern/carve/patches/series
@@ -2,3 +2,5 @@ strict_flags.patch
 includes.patch
 win32.patch
 mesh_iterator.patch
+mingw.patch
+gcc46.patch