diff --git a/src/calibre/gui2/__init__.py b/src/calibre/gui2/__init__.py
index 426f4da50b..14789332e4 100644
--- a/src/calibre/gui2/__init__.py
+++ b/src/calibre/gui2/__init__.py
@@ -130,7 +130,7 @@ class CopyButton(QPushButton):
                 return
         except:
             pass
-        return QPushButton.event(self, ev)
+        QPushButton.keyPressEvent(self, ev)
 
 
     def keyReleaseEvent(self, ev):
@@ -139,7 +139,7 @@ class CopyButton(QPushButton):
                 return
         except:
             pass
-        return QPushButton.event(self, ev)
+        QPushButton.keyReleaseEvent(self, ev)
 
     def mouseReleaseEvent(self, ev):
         ev.accept()