diff --git a/README.md b/README.md
index 77fe709..dbcddcc 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ This is a simple static html blog generator using only 278 lines (as of this sub
 
 ## Organization
 
-Posts are placed within the `posts` directory and are written in markdown.
+Posts are placed within the `posts` directory and are written in markdown, and have `.md` extension (anything else can be used to effectively save drafts inplace, for example).
 
 Each post begins with a metadata section delimited by lines containing nothing but dashes.
 
diff --git a/makeposts.sh b/makeposts.sh
index 5e1f2d2..7d8c7f3 100755
--- a/makeposts.sh
+++ b/makeposts.sh
@@ -75,7 +75,7 @@ htmlbody=`mktemp`
 
 postmanifest=`mktemp`
 
-for file in `ls -1 posts`;
+for file in `ls -1 posts/*.md`;
 do
     outfile=${file%%.md}.html