diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index a824ba539..e5ba0079b 100644
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -321,6 +321,7 @@ sub find_src_files () {
 		my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
 		if (! defined $f) {
 			warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
+			return;
 		}
 	
 		if ($underlay) {
diff --git a/debian/changelog b/debian/changelog
index 31deaf9aa..049a3a898 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -12,6 +12,8 @@ ikiwiki (3.20100502) UNRELEASED; urgency=low
     are kept separate for now to avoid breaking modified templates.)
   * websetup: Only display Setup button on admins' preferences page. 
   * graphviz: Fix display of preexisting images in preview mode.
+  * Fixes a bug in skipping of illegal source files introduced in 
+    3.20100427.
 
  -- Joey Hess <joeyh@debian.org>  Sun, 02 May 2010 13:22:50 -0400