diff --git a/lib/pry.rb b/lib/pry.rb
index 86ed4723..963c7445 100644
--- a/lib/pry.rb
+++ b/lib/pry.rb
@@ -114,7 +114,7 @@ class Pry
                 end,
                ]
 
-  DEFAULT_SYSTEM = proc do |cmd|
+  DEFAULT_SYSTEM = proc do |output, cmd, _|
     if !system(cmd)
       output.puts "Error: there was a problem executing system command: #{cmd}"
     end
diff --git a/lib/pry/config.rb b/lib/pry/config.rb
index c5924fc8..28fb7a20 100644
--- a/lib/pry/config.rb
+++ b/lib/pry/config.rb
@@ -120,7 +120,8 @@ class Pry
     attr_accessor :control_d_handler
 
     # @return [Proc] The proc that runs system commands
-    #   The proc is passed the command string to eval
+    #   The proc is passed the pry output object, the command string
+    #   to eval, and a reference to the pry instance
     attr_accessor :system
   end
 end
diff --git a/lib/pry/default_commands/shell.rb b/lib/pry/default_commands/shell.rb
index d9754ec2..0987feca 100644
--- a/lib/pry/default_commands/shell.rb
+++ b/lib/pry/default_commands/shell.rb
@@ -12,7 +12,7 @@ class Pry
             output.puts "No such directory: #{dest}"
           end
         else
-          Pry.config.system.call(cmd)
+          Pry.config.system.call(output, cmd, _pry_)
         end
       end