diff --git a/src/backends/meta-backend.c b/src/backends/meta-backend.c
index e4293350c..e2466ae43 100644
--- a/src/backends/meta-backend.c
+++ b/src/backends/meta-backend.c
@@ -657,7 +657,7 @@ upower_properties_changed (GDBusProxy *proxy,
           g_signal_emit (backend, signals[LID_IS_CLOSED_CHANGED], 0,
                          priv->lid_is_closed);
 
-          if (lid_is_closed)
+          if (!lid_is_closed)
             reset_idle_time = TRUE;
         }
     }