diff --git a/.gitmodules b/.gitmodules
index 35cc5bb05d3992f61e5adc513da53bae395bcb60..231d82e9432289b961e4a2dfceb216fdf714135d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "qhull"]
 	path = qhull
 	url = git://gitorious.org/qhull/qhull.git
+[submodule "docsys"]
+	path = docsys
+	url = git://niftools.git.sourceforge.net/gitroot/niftools/nifdocsys
diff --git a/docsys b/docsys
new file mode 160000
index 0000000000000000000000000000000000000000..c8c5252b7b1a02af47938ed8075cd7ea0c0f7915
--- /dev/null
+++ b/docsys
@@ -0,0 +1 @@
+Subproject commit c8c5252b7b1a02af47938ed8075cd7ea0c0f7915