diff --git a/DeveloperFAQ.wiki b/DeveloperFAQ.wiki
index a348262..2fb1a8e 100644
--- a/DeveloperFAQ.wiki
+++ b/DeveloperFAQ.wiki
@@ -57,4 +57,12 @@
 
 * I'm seeing the same config name appear twice in dashboard?
 
-Please double check that you don't have a Unicode invisible space character, that maybe was copied from a webpage or was inserted at the beginning of the file by your text editor, in your config name.
\ No newline at end of file
+Please double check that you don't have a Unicode invisible space character, that maybe was copied from a webpage or was inserted at the beginning of the file by your text editor, in your config name.
+
+* I have an existing Adaptor that only provides full data pushes - how do I make it support incremental pushes?
+
+The adaptor must extend `com/google/enterprise/adaptor/PollingIncrementalLister` which has a single method `getModifiedDocIds(DocIdPusher pusher)` ; when initializing the Adaptor, the single line:
+{{{
+setPollingIncrementalLister(this)
+}}}
+should then suffice. 
\ No newline at end of file