diff --git a/luadoc/awesome.lua b/luadoc/awesome.lua
index afceae61..b5e96665 100644
--- a/luadoc/awesome.lua
+++ b/luadoc/awesome.lua
@@ -34,7 +34,7 @@ module("awesome")
 -- @param cmd The command to launch.
 -- @param use_sn Use startup-notification, true or false, default to true.
 -- @param screen Optional screen number to spawn the command on.
--- @return Nothing is everything is OK, or an error string if an error occured.
+-- @return Process ID if everything is OK, or an error string if an error occured.
 
 --- Add a global signal.
 -- @param name A string with the event name.
diff --git a/spawn.c b/spawn.c
index eb8132d9..e476e9a8 100644
--- a/spawn.c
+++ b/spawn.c
@@ -287,7 +287,7 @@ spawn_command(const gchar *command_line, GError **error)
  * \lparam The command to launch.
  * \lparam Use startup-notification, true or false, default to true.
  * \lparam The optional screen number to spawn the command on.
- * \lreturn Nothing if launch was successful, an error string otherwise.
+ * \lreturn Process ID if everything is OK, or an error string if an error occured.
  */
 int
 luaA_spawn(lua_State *L)