diff --git a/src/nvim/ex_docmd.c b/src/nvim/ex_docmd.c
index 247f4c09ef..b880ec4f6d 100644
--- a/src/nvim/ex_docmd.c
+++ b/src/nvim/ex_docmd.c
@@ -5266,8 +5266,7 @@ static void ex_command(exarg_T *eap)
   } else if (!ASCII_ISUPPER(*name)) {
     EMSG(_("E183: User defined commands must start with an uppercase letter"));
     return;
-  } else if ((name_len == 1 && *name == 'X')
-             || (name_len <= 4 && STRNCMP(name, "Next", name_len) == 0)) {
+  } else if (name_len <= 4 && STRNCMP(name, "Next", name_len) == 0) {
     EMSG(_("E841: Reserved name, cannot be used for user defined command"));
     return;
   } else {
diff --git a/src/nvim/testdir/test_usercommands.vim b/src/nvim/testdir/test_usercommands.vim
index b23a4aa62f..2c7cb7bab7 100644
--- a/src/nvim/testdir/test_usercommands.vim
+++ b/src/nvim/testdir/test_usercommands.vim
@@ -201,7 +201,6 @@ func Test_CmdErrors()
   call assert_fails('com! docmd :', 'E183:')
   call assert_fails('com! \<Tab> :', 'E182:')
   call assert_fails('com! _ :', 'E182:')
-  call assert_fails('com! X :', 'E841:')
   call assert_fails('com! - DoCmd :', 'E175:')
   call assert_fails('com! -xxx DoCmd :', 'E181:')
   call assert_fails('com! -addr DoCmd :', 'E179:')