diff --git a/Sources/SwiftTerm/iOS/iOSTextInput.swift b/Sources/SwiftTerm/iOS/iOSTextInput.swift
index 9d632427..e4173ebd 100644
--- a/Sources/SwiftTerm/iOS/iOSTextInput.swift
+++ b/Sources/SwiftTerm/iOS/iOSTextInput.swift
@@ -60,7 +60,7 @@ extension TerminalView: UITextInput {
     }
 
     public func text(in range: UITextRange) -> String? {
-        let r = range as! xTextRange
+        guard let r = range as? xTextRange else { return "" }
         
         if textInputStorage.count >= max (r._start, r._end) {
             let res = String (textInputStorage [r._start..<r._end])