diff --git a/share/functions/__fish_print_help.fish b/share/functions/__fish_print_help.fish
index 352070d6d..a4888898f 100644
--- a/share/functions/__fish_print_help.fish
+++ b/share/functions/__fish_print_help.fish
@@ -1,5 +1,7 @@
 function __fish_print_help --description "Print help message for the specified fish function or builtin" --argument-names item error_message
     switch $item
+        case !
+            set item not
         case .
             set item source
         case :
diff --git a/share/functions/help.fish b/share/functions/help.fish
index 361e31b84..ff61143a2 100644
--- a/share/functions/help.fish
+++ b/share/functions/help.fish
@@ -129,6 +129,8 @@ function help --description 'Show help for the fish shell'
 
     set -l fish_help_page
     switch "$fish_help_item"
+        case "!"
+            set fish_help_page "cmds/not.html"
         case "."
             set fish_help_page "cmds/source.html"
         case ":"
diff --git a/src/builtins/shared.rs b/src/builtins/shared.rs
index 213b815f7..f80935333 100644
--- a/src/builtins/shared.rs
+++ b/src/builtins/shared.rs
@@ -113,6 +113,10 @@ struct BuiltinData {
 // Functions that are bound to builtin_generic are handled directly by the parser.
 // NOTE: These must be kept in sorted order!
 const BUILTIN_DATAS: &[BuiltinData] = &[
+    BuiltinData {
+        name: L!("!"),
+        func: builtin_generic,
+    },
     BuiltinData {
         name: L!("."),
         func: source::source,
@@ -471,6 +475,7 @@ pub fn builtin_get_names() -> impl Iterator<Item = &'static wstr> {
 /// Return a one-line description of the specified builtin.
 pub fn builtin_get_desc(name: &wstr) -> Option<&'static wstr> {
     let desc = match name {
+        _ if name == "!" => wgettext!("Negate exit status of job"),
         _ if name == "." => wgettext!("Evaluate contents of file"),
         _ if name == ":" => wgettext!("Return a successful result"),
         _ if name == "[" => wgettext!("Test a condition"), // ]
diff --git a/tests/checks/not.fish b/tests/checks/not.fish
index 77a03c419..111e434f8 100644
--- a/tests/checks/not.fish
+++ b/tests/checks/not.fish
@@ -8,3 +8,14 @@ echo $status
 not not sh -c 'exit 34'
 echo $status
 # CHECK: 34
+
+! -h
+# CHECKERR: fish: !: missing man page
+# CHECKERR: Documentation may not be installed.
+# CHECKERR: `help !` will show an online version
+
+function !
+    echo overridden! $argv
+end
+! -h
+# CHECK: overridden! -h