diff --git a/README.org b/README.org
index 37dd03a..0d3c793 100644
--- a/README.org
+++ b/README.org
@@ -21,6 +21,8 @@ Get the file, add to load path, and
 - =eldoc-box-max-pixel-width= & =eldoc-box-max-pixel-height= :: Set them according to the screen resolution of your machine.
 - =eldoc-box-only-multi-line= :: Set this to non-nil and eldoc-box only display multi-line message in childframe. One line messages are left in minibuffer.
 - =eldoc-box-cleanup-interval= :: After this amount of seconds will eldoc-box attempt to cleanup the childframe. E.g. if it is set to 1, the childframe is cleared 1 second after you moved the point to somewhere else (that doesn't have a doc to show). This doesn't apply to =eldoc-box-hover-at-point-mode=, in that mode the childframe is cleared as soon as point moves.
+- =eldoc-box-fringe-use-same-bg= :: T means fringe's background color is set to as same as that of default. Default to t.
+
 ** Use with eglot
 As of writing this README, eglot doesn't have a public mode hook, use this hook:
 #+BEGIN_SRC emacs-lisp
diff --git a/eldoc-box.el b/eldoc-box.el
index ba66e78..ac751ea 100644
--- a/eldoc-box.el
+++ b/eldoc-box.el
@@ -113,6 +113,9 @@ if you want to dynamically change the maximum height.")
 This should be a function that returns a (X . Y) cons cell.
 It will be passes with two arguments: WIDTH and HEIGHT of the childframe.")
 
+(defvar eldoc-box-fringe-use-same-bg t
+  "T means fringe's background color is set to as same as that of default.")
+
 ;;;;; Function
 (defvar eldoc-box--frame nil ;; A backstage variable
   "The frame to display doc.")
@@ -257,13 +260,16 @@ Checkout `lsp-ui-doc--make-frame', `lsp-ui-doc--move-frame'."
       (setq window (display-buffer-in-child-frame
                     buffer
                     `((child-frame-parameters . ,parameter))))
-      (setq frame (window-frame window)))
+      (setq frame (window-frame window))
+      (when eldoc-box-fringe-use-same-bg
+        (set-face-attribute 'fringe frame :background nil :inherit 'default)))
     (set-window-dedicated-p window t)
     (redirect-frame-focus frame (frame-parent frame))
     (set-face-attribute 'internal-border frame :inherit 'eldoc-box-border)
     (set-face-attribute 'default frame
                         :background (face-attribute 'eldoc-box-body :background main-frame)
                         :font (face-attribute 'eldoc-box-body :font main-frame))
+
     ;; set size
     (let* ((size
             (window-text-pixel-size