diff --git a/include/text.php b/include/text.php
index d1ccb3c96c..e8384123c4 100644
--- a/include/text.php
+++ b/include/text.php
@@ -652,14 +652,14 @@ function get_template_file($a, $filename, $root = '') {
 	$theme = current_theme();
 
 	// Make sure $root ends with a slash /
-	if ($root !== '' && $root[strlen($root) - 1] !== '/') {
+	if ($root !== '' && substr($root, -1, 1) !== '/') {
 		$root = $root . '/';
 	}
 
 	if (file_exists("{$root}view/theme/$theme/$filename")) {
 		$template_file = "{$root}view/theme/$theme/$filename";
-	} elseif (x($a->theme_info, "extends") && file_exists("{$root}view/theme/{$a->theme_info[\"extends\"]}/$filename")) {
-		$template_file = "{$root}view/theme/{$a->theme_info[\"extends\"]}/$filename";
+	} elseif (x($a->theme_info, "extends") && file_exists(sprintf('%sview/theme/%s}/%s', $root, $a->theme_info["extends"], $filename))) {
+		$template_file = sprintf('%sview/theme/%s}/%s', $root, $a->theme_info["extends"], $filename);
 	} elseif (file_exists("{$root}/$filename")) {
 		$template_file = "{$root}/$filename";
 	} else {