--- a/configure	Fri Aug 19 15:46:38 2016 +0200
+++ b/configure	Fri Aug 19 15:50:57 2016 +0200
@@ -145,6 +145,7 @@
       fi
       if [ "$OSTYPE" = "openbsd" ]; then
          LUA_INCDIR="/usr/local/include";
+         LUA_INCDIR_SET="yes"
       fi
       ;;
    --libdir=*)