--- a/QScintilla/Editor.py	Tue Dec 19 19:46:23 2017 +0100
+++ b/QScintilla/Editor.py	Wed Dec 20 12:27:43 2017 +0100
@@ -4539,6 +4539,8 @@
                 return
             elif char == '(':
                 self.cancelList()
+            else:
+                self.__acTimer.stop()
         
         if self.callTipsStyle() != QsciScintilla.CallTipsNone and \
            self.lexer_ is not None and chr(charNumber) in '()':