diff --git a/src/ncurses_ui.cc b/src/ncurses_ui.cc
index 7d6a3d30..7d94d08c 100644
--- a/src/ncurses_ui.cc
+++ b/src/ncurses_ui.cc
@@ -305,7 +305,7 @@ using Utf8Policy = utf8::InvalidPolicy::Pass;
 using Utf8Iterator = utf8::iterator<const char*, Utf8Policy>;
 void addutf8str(WINDOW* win, Utf8Iterator begin, Utf8Iterator end)
 {
-    waddstr(win, StringView(begin.base(), end.base()).zstr());
+    waddnstr(win, begin.base(), end.base() - begin.base());
 }
 
 static CharCoord window_size(WINDOW* win)