diff --git a/src/ui/inputwin.c b/src/ui/inputwin.c
index 5b5fb381..365eed02 100644
--- a/src/ui/inputwin.c
+++ b/src/ui/inputwin.c
@@ -142,6 +142,10 @@ _inp_get_char(char *input, int *size)
     // if it wasn't an arrow key etc
     if (!_handle_edit(result, ch, input, size)) {
         if (_printable(ch) && result != KEY_CODE_YES) {
+            if (*size >= INP_WIN_MAX) {
+                return ERR;
+            }
+
             inp_x = getcurx(inp_win);
 
             // handle insert if not at end of input