diff --git a/exwm-core.el b/exwm-core.el
index 758486c..cc6a7bb 100644
--- a/exwm-core.el
+++ b/exwm-core.el
@@ -411,6 +411,7 @@ One of `line-mode' or `char-mode'.")
         left-fringe-width 0
         right-fringe-width 0
         vertical-scroll-bar nil
+        eldoc-documentation-functions nil
         mode-line-position nil
         mode-line-modified nil
         mode-line-mule-info nil