diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 52ae2aa8613..15875a86632 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -880,7 +880,10 @@ sub mimetype_guess {
 
 	if ($mimetypes_file) {
 		my $file = $mimetypes_file;
-		#$file =~ m#^/# or $file = "$projectroot/$path/$file";
+		if ($file !~ m!^/!) { # if it is relative path
+			# it is relative to project
+			$file = "$projectroot/$project/$file";
+		}
 		$mime = mimetype_guess_file($filename, $file);
 	}
 	$mime ||= mimetype_guess_file($filename, '/etc/mime.types');