diff --git a/Mac/MainWindow/AddFeed/AddFeedWindowController.swift b/Mac/MainWindow/AddFeed/AddFeedWindowController.swift
index 386a7fc29..85cd0ae1e 100644
--- a/Mac/MainWindow/AddFeed/AddFeedWindowController.swift
+++ b/Mac/MainWindow/AddFeed/AddFeedWindowController.swift
@@ -100,7 +100,13 @@ class AddFeedWindowController : NSWindowController {
 			cancelSheet()
 			return;
 		}
-		guard let url = URL(string: normalizedURLString) else {
+		
+		guard let encodedString = normalizedURLString.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed) else {
+			cancelSheet()
+			return;
+		}
+		
+		guard let url = URL(string: encodedString) else {
 			cancelSheet()
 			return
 		}