diff --git a/lib/puma/events.rb b/lib/puma/events.rb
index 311084f5..d1c7b645 100644
--- a/lib/puma/events.rb
+++ b/lib/puma/events.rb
@@ -106,15 +106,21 @@ module Puma
     end
 
     # An unknown error has occurred.
-    # +server+ is the Server object, +error+ an exception object, and
-    # +kind+ some additional info.
+    # +server+ is the Server object, +error+ an exception object,
+    # +kind+ some additional info, and +env+ the request.
     #
-    def unknown_error(server, error, kind="Unknown")
+    def unknown_error(server, error, kind="Unknown", env=nil)
       if error.respond_to? :render
         error.render "#{Time.now}: #{kind} error", @stderr
       else
-        @stderr.puts "#{Time.now}: #{kind} error: #{error.inspect}"
-        @stderr.puts error.backtrace.join("\n")
+        if env
+          string_block = [ "#{Time.now}: #{kind} error handling request { #{env['REQUEST_METHOD']} #{env['PATH_INFO']} }" ]
+          string_block << error.inspect
+        else
+          string_block = [ "#{Time.now}: #{kind} error: #{error.inspect}" ]
+        end
+        string_block << error.backtrace
+        @stderr.puts string_block.join("\n")
       end
     end
 
diff --git a/lib/puma/server.rb b/lib/puma/server.rb
index 26f51f5c..a8ce73b6 100644
--- a/lib/puma/server.rb
+++ b/lib/puma/server.rb
@@ -588,8 +588,7 @@ module Puma
           res_body = ["Request was internally terminated early\n"]
 
         rescue StandardError => e
-          STDERR.puts "#{Time.now}: error handling request: { #{ env['REQUEST_METHOD'] } #{ env['PATH_INFO'] } }:"
-          @events.unknown_error self, e, "Rack app"
+          @events.unknown_error self, e, "Rack app", env
 
           status, headers, res_body = lowlevel_error(e, env)
         end