autoload/lsp/symbol.vim |  4 ++--
 doc/lsp.txt             | 11 +++++++----

diff --git a/autoload/lsp/symbol.vim b/autoload/lsp/symbol.vim
index 57164546107e8361bbf3dea42e6c054a1620432e..bcd547a33200419de42352aa6e27c427aa5b1d16 100644
--- a/autoload/lsp/symbol.vim
+++ b/autoload/lsp/symbol.vim
@@ -838,9 +838,9 @@     if ln == getcurpos(symPopupMenu)[1]
       win_execute(symPopupMenu, "normal! G")
     endif
   elseif key == "\<PageDown>"
-    win_execute(symPopupMenu, 'normal! ' .. "\<C-d>")
+    win_execute(symPopupMenu, "normal! \<C-d>")
   elseif key == "\<PageUp>"
-    win_execute(symPopupMenu, 'normal! ' .. "\<C-u>")
+    win_execute(symPopupMenu, "normal! \<C-u>")
   elseif key == "\<C-F>"
       || key == "\<C-B>"
       || key == "\<C-Home>"
diff --git a/doc/lsp.txt b/doc/lsp.txt
index 6d4c58c011b09a754d2d6254f158e4ffcb11dc84..68e4861abbbd632d72209d668c06e5b24573de9e 100644
--- a/doc/lsp.txt
+++ b/doc/lsp.txt
@@ -773,10 +773,13 @@ 			menu.  When a symbol is selected in the popup menu by
 			pressing <Enter> or <Space>, jump to the location of
 			the symbol.
 
-			The <Up>, <Down>, <C-F>, <C-B>, <PageUp>, <PageDown>,
-			<C-Home>, <C-End>, <C-N>, <C-P> keys can be used to
-			scroll the popup menu.  The <Esc> or <Ctrl-C> keys can
-			be used to cancel the popup menu.
+			The <Up>, <Down>, <Tab>, <S-Tab>, <C-N>, <C-P>,
+			<ScrollWheelUp>, ScrollWheelDown> keys can be used to
+			scroll popup menu one item at a time. <PageUp> and
+			<PageDown> can be used to scroll a page of popup
+			window, while <C-F> and <C-B> can be used to scroll a
+			page of underlying window.  The <Esc> or <Ctrl-C> keys
+			can be used to cancel the popup menu.
 
 			If one or more keyword characters are typed, then only
 			the symbols containing the keyword characters are