diff --git a/docs/Makefile b/docs/Makefile
index 1263bc3..c5d2df4 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -58,9 +58,9 @@ html: api
 	@echo
 	@echo "Build finished. The HTML pages are in build/html."
 
-api: source/api/generated/gen.rst
+api: source/api/generated/gen.txt
 
-source/api/generated/gen.rst:
+source/api/generated/gen.txt:
 	python autogen_api.py
 	@echo "Build API docs finished."
 
diff --git a/docs/autogen_api.py b/docs/autogen_api.py
index dac44ea..74f841d 100755
--- a/docs/autogen_api.py
+++ b/docs/autogen_api.py
@@ -58,9 +58,9 @@ if __name__ == '__main__':
                                            r'\.testing\.mkdoctests']
     # Now, generate the outputs
     docwriter.write_api_docs(outdir)
-    # Write index with .rst extension - we can include it, but Sphinx won't try
+    # Write index with .txt extension - we can include it, but Sphinx won't try
     # to compile it
-    docwriter.write_index(outdir, 'gen.rst',
+    docwriter.write_index(outdir, 'gen.txt',
                           relative_to = pjoin('source','api')
                           )
     print ('%d files written' % len(docwriter.written_modules))
diff --git a/docs/source/api/index.rst b/docs/source/api/index.rst
index 7b0bea3..d5c55f4 100644
--- a/docs/source/api/index.rst
+++ b/docs/source/api/index.rst
@@ -9,4 +9,4 @@
    :Release: |version|
    :Date: |today|
 
-.. include:: generated/gen.rst
+.. include:: generated/gen.txt