diff --git a/index.html b/index.html
index c865733..f1d3e20 100644
--- a/index.html
+++ b/index.html
@@ -1133,7 +1133,9 @@ <h3><a name="mkVars"></a>Android.mk Variables</h3>
 </tr>
 <tr>
 <td valign="top">LOCAL_UNINSTALLABLE_MODULE</td>
-<td valign="top"></td>
+<td valign="top">If set to true, this module will not be installed to system.img but build system still build it.
+Useful when you need some executable binary by $(INCLUDE_EXECUTABLE) but dont need it in system.img
+</td>
 </tr>
 <tr>
 <td valign="top">LOCAL_UNSTRIPPED_PATH</td>