diff --git a/qutebrowser/completion/completer.py b/qutebrowser/completion/completer.py
index 0c83a4976..c5c1915ca 100644
--- a/qutebrowser/completion/completer.py
+++ b/qutebrowser/completion/completer.py
@@ -157,7 +157,7 @@ class Completer(QObject):
         result = runner.parse(text, fallback=True, keep=True)
         parts = [x for x in result.cmdline if x]
         pos = self._cmd.cursorPosition() - len(self._cmd.prefix())
-        pos = min(pos, len(text))
+        pos = min(pos, len(text))  # Qt treats 2-byte UTF-16 chars as 2 chars
         log.completion.debug('partitioning {} around position {}'.format(parts,
                                                                          pos))
         for i, part in enumerate(parts):