diff --git a/docs/build.sh b/docs/build.sh
index 904d2d21..f5700c38 100755
--- a/docs/build.sh
+++ b/docs/build.sh
@@ -2,11 +2,11 @@
 
 for i in ispc perfguide faq; do
     rst2html.py --template=template.txt --link-stylesheet \
-        --stylesheet-path=css/style.css $i.txt > $i.html
+        --stylesheet-path=css/style.css $i.rst > $i.html
 done
 
 rst2html.py --template=template-perf.txt --link-stylesheet \
-        --stylesheet-path=css/style.css perf.txt > perf.html
+        --stylesheet-path=css/style.css perf.rst > perf.html
 
 #rst2latex --section-numbering --documentclass=article --documentoptions=DIV=9,10pt,letterpaper ispc.txt > ispc.tex
 #pdflatex ispc.tex
diff --git a/docs/faq.txt b/docs/faq.rst
similarity index 100%
rename from docs/faq.txt
rename to docs/faq.rst
diff --git a/docs/ispc.txt b/docs/ispc.rst
similarity index 100%
rename from docs/ispc.txt
rename to docs/ispc.rst
diff --git a/docs/perf.txt b/docs/perf.rst
similarity index 100%
rename from docs/perf.txt
rename to docs/perf.rst
diff --git a/docs/perfguide.txt b/docs/perfguide.rst
similarity index 100%
rename from docs/perfguide.txt
rename to docs/perfguide.rst