diff --git a/plugins/af_zz_imgproxy/init.php b/plugins/af_zz_imgproxy/init.php
index bfa44a3b1..9ef813ce8 100644
--- a/plugins/af_zz_imgproxy/init.php
+++ b/plugins/af_zz_imgproxy/init.php
@@ -24,9 +24,11 @@ class Af_Zz_ImgProxy extends Plugin {
 	}
 
 	function hook_enclosure_entry($enc) {
-		$proxy_all = $this->host->get($this, "proxy_all");
+		if (preg_match("/image/", $enc["type"]) || preg_match("/\.(jpg|png|gif|bmp)/i", $enc["filename"])) {
+			$proxy_all = $this->host->get($this, "proxy_all");
 
-		$enc["content_url"] = $this->rewrite_url_if_needed($enc["content_url"], $proxy_all);
+			$enc["content_url"] = $this->rewrite_url_if_needed($enc["content_url"], $proxy_all);
+		}
 
 		return $enc;
 	}