diff --git a/doc/telescope.txt b/doc/telescope.txt
index bb43329500..ccde4e8582 100644
--- a/doc/telescope.txt
+++ b/doc/telescope.txt
@@ -1835,6 +1835,8 @@ builtin.diagnostics({opts})                  *telescope.builtin.diagnostics()*
         {sort_by}             (string)          sort order of the diagnostics
                                                 results; see above notes
                                                 (default: "buffer")
+        {show_source}         (boolean)         show source of diagnostic
+                                                entries (default: false)
 
 
 
diff --git a/lua/telescope/builtin/__diagnostics.lua b/lua/telescope/builtin/__diagnostics.lua
index ec129d634f..dde9b1c657 100644
--- a/lua/telescope/builtin/__diagnostics.lua
+++ b/lua/telescope/builtin/__diagnostics.lua
@@ -107,12 +107,13 @@ local diagnostics_to_tbl = function(opts)
   end
 
   local preprocess_diag = function(diagnostic)
+    local source = opts.show_source and " (" .. diagnostic.source .. ")" or ""
     return {
       bufnr = diagnostic.bufnr,
       filename = bufnr_name_map[diagnostic.bufnr],
       lnum = diagnostic.lnum + 1,
       col = diagnostic.col + 1,
-      text = vim.trim(diagnostic.message:gsub("[\n]", "")),
+      text = vim.trim(diagnostic.message:gsub("[\n]", "")) .. source,
       type = severities[diagnostic.severity] or severities[1],
     }
   end
diff --git a/lua/telescope/builtin/init.lua b/lua/telescope/builtin/init.lua
index 6e27c27ab3..cd12622bc7 100644
--- a/lua/telescope/builtin/init.lua
+++ b/lua/telescope/builtin/init.lua
@@ -539,6 +539,7 @@ builtin.lsp_dynamic_workspace_symbols = require_on_exported_call("telescope.buil
 ---@field namespace number: limit your diagnostics to a specific namespace
 ---@field disable_coordinates boolean: don't show the line & row numbers (default: false)
 ---@field sort_by string: sort order of the diagnostics results; see above notes (default: "buffer")
+---@field show_source boolean: show source of diagnostic entries (default: false)
 builtin.diagnostics = require_on_exported_call("telescope.builtin.__diagnostics").get
 
 local apply_config = function(mod)