diff --git a/pkgs/applications/graphics/meshlab/include-unistd.diff b/pkgs/applications/graphics/meshlab/include-unistd.diff
new file mode 100644
index 000000000000..74f28a4d2119
--- /dev/null
+++ b/pkgs/applications/graphics/meshlab/include-unistd.diff
@@ -0,0 +1,13 @@
+*** old/vcglib/wrap/ply/plystuff.h	2013-02-09 00:00:04.110705851 -0500
+--- new/vcglib/wrap/ply/plystuff.h	2013-02-09 15:20:53.482205183 -0500
+***************
+*** 75,80 ****
+--- 75,81 ----
+  #define pb_close  _close
+  #define DIR_SEP "\\"
+  #else
++ #include <unistd.h>
+  #define pb_mkdir(n)  mkdir(n,0755)
+  #define pb_access access
+  #define pb_stat   stat
+