diff --git a/themes/danbooru/view.theme.php b/themes/danbooru/view.theme.php
index 8d84f44c..57412298 100644
--- a/themes/danbooru/view.theme.php
+++ b/themes/danbooru/view.theme.php
@@ -31,7 +31,7 @@ class CustomViewImageTheme extends ViewImageTheme {
 
 		if(!is_null($image->source)) {
 			$h_source = html_escape($image->source);
-			if(substr($image->source, 0, 7) == "http://") {
+			if(substr($image->source, 0, 7) != "http://") {
 				$h_source = "http://" . $h_source;
 			}
 			$html .= "<br>Source: <a href='$h_source'>link</a>";