diff --git a/lib/handlers_v4.js b/lib/handlers_v4.js
index fde452e..c9d1294 100755
--- a/lib/handlers_v4.js
+++ b/lib/handlers_v4.js
@@ -165,6 +165,10 @@ function execute_request(request) {
             }
         );
 
+        if (!result.mime) {
+            return;
+        }
+
         if (this.hideUndefined &&
             result.mime["text/plain"] === "undefined") {
             return;
diff --git a/lib/handlers_v5.js b/lib/handlers_v5.js
index a76661d..49dc486 100755
--- a/lib/handlers_v5.js
+++ b/lib/handlers_v5.js
@@ -185,6 +185,10 @@ function execute_request(request) {
             }
         );
 
+        if (!result.mime) {
+            return;
+        }
+
         if (this.hideUndefined &&
             result.mime["text/plain"] === "undefined") {
             return;