diff --git a/include/ghostty.h b/include/ghostty.h
index 354da33d0..42cfc5a42 100644
--- a/include/ghostty.h
+++ b/include/ghostty.h
@@ -88,13 +88,12 @@ typedef enum {
   GHOSTTY_MODS_CTRL = 1 << 1,
   GHOSTTY_MODS_ALT = 1 << 2,
   GHOSTTY_MODS_SUPER = 1 << 3,
-  GHOSTTY_MODS_FN = 1 << 4,
-  GHOSTTY_MODS_CAPS = 1 << 5,
-  GHOSTTY_MODS_NUM = 1 << 6,
-  GHOSTTY_MODS_SHIFT_RIGHT = 1 << 7,
-  GHOSTTY_MODS_CTRL_RIGHT = 1 << 8,
-  GHOSTTY_MODS_ALT_RIGHT = 1 << 9,
-  GHOSTTY_MODS_SUPER_RIGHT = 1 << 10,
+  GHOSTTY_MODS_CAPS = 1 << 4,
+  GHOSTTY_MODS_NUM = 1 << 5,
+  GHOSTTY_MODS_SHIFT_RIGHT = 1 << 6,
+  GHOSTTY_MODS_CTRL_RIGHT = 1 << 7,
+  GHOSTTY_MODS_ALT_RIGHT = 1 << 8,
+  GHOSTTY_MODS_SUPER_RIGHT = 1 << 9,
 } ghostty_input_mods_e;
 
 typedef enum {
diff --git a/macos/Sources/App/macOS/AppDelegate.swift b/macos/Sources/App/macOS/AppDelegate.swift
index d6af4d296..8c1f392d6 100644
--- a/macos/Sources/App/macOS/AppDelegate.swift
+++ b/macos/Sources/App/macOS/AppDelegate.swift
@@ -354,11 +354,6 @@ class AppDelegate: NSObject,
             return
         }
 
-        if (equiv.modifiers.contains(.function)) {
-            // NSMenuItem key equivalent cannot contain function modifiers.
-            return
-        }
-
         menu.keyEquivalent = equiv.key
         menu.keyEquivalentModifierMask = equiv.modifiers
     }
diff --git a/macos/Sources/Ghostty/Ghostty.Input.swift b/macos/Sources/Ghostty/Ghostty.Input.swift
index 89013cab8..d7fd96f12 100644
--- a/macos/Sources/Ghostty/Ghostty.Input.swift
+++ b/macos/Sources/Ghostty/Ghostty.Input.swift
@@ -14,7 +14,6 @@ extension Ghostty {
         if (mods.rawValue & GHOSTTY_MODS_CTRL.rawValue != 0) { flags.insert(.control) }
         if (mods.rawValue & GHOSTTY_MODS_ALT.rawValue != 0) { flags.insert(.option) }
         if (mods.rawValue & GHOSTTY_MODS_SUPER.rawValue != 0) { flags.insert(.command) }
-        if (mods.rawValue & GHOSTTY_MODS_FN.rawValue != 0) { flags.insert(.function) }
         return flags
     }
 
@@ -26,7 +25,6 @@ extension Ghostty {
         if (flags.contains(.control)) { mods |= GHOSTTY_MODS_CTRL.rawValue }
         if (flags.contains(.option)) { mods |= GHOSTTY_MODS_ALT.rawValue }
         if (flags.contains(.command)) { mods |= GHOSTTY_MODS_SUPER.rawValue }
-        if (flags.contains(.function)) { mods |= GHOSTTY_MODS_FN.rawValue }
         if (flags.contains(.capsLock)) { mods |= GHOSTTY_MODS_CAPS.rawValue }
 
         // Handle sided input. We can't tell that both are pressed in the
diff --git a/macos/Sources/Ghostty/SurfaceView_AppKit.swift b/macos/Sources/Ghostty/SurfaceView_AppKit.swift
index 8148118fb..d64c2fead 100644
--- a/macos/Sources/Ghostty/SurfaceView_AppKit.swift
+++ b/macos/Sources/Ghostty/SurfaceView_AppKit.swift
@@ -743,7 +743,6 @@ extension Ghostty {
             case 0x3B, 0x3E: mod = GHOSTTY_MODS_CTRL.rawValue
             case 0x3A, 0x3D: mod = GHOSTTY_MODS_ALT.rawValue
             case 0x37, 0x36: mod = GHOSTTY_MODS_SUPER.rawValue
-            case 0x3F: mod = GHOSTTY_MODS_FN.rawValue
             default: return
             }
 
diff --git a/src/cli/list_keybinds.zig b/src/cli/list_keybinds.zig
index 5cfaeef02..9e734d1ec 100644
--- a/src/cli/list_keybinds.zig
+++ b/src/cli/list_keybinds.zig
@@ -133,7 +133,6 @@ fn prettyPrint(alloc: Allocator, keybinds: Config.Keybinds) !u8 {
     const ctrl_style: vaxis.Style = .{ .fg = .{ .index = 2 } };
     const alt_style: vaxis.Style = .{ .fg = .{ .index = 3 } };
     const shift_style: vaxis.Style = .{ .fg = .{ .index = 4 } };
-    const fn_style: vaxis.Style = .{ .fg = .{ .index = 5 } };
 
     var longest_col: usize = 0;
 
@@ -143,10 +142,6 @@ fn prettyPrint(alloc: Allocator, keybinds: Config.Keybinds) !u8 {
 
         var result: vaxis.Window.PrintResult = .{ .col = 0, .row = 0, .overflow = false };
         const trigger = bind.trigger;
-        if (trigger.mods.function) {
-            result = try win.printSegment(.{ .text = "fn   ", .style = fn_style }, .{ .col_offset = result.col });
-            result = try win.printSegment(.{ .text = " + " }, .{ .col_offset = result.col });
-        }
         if (trigger.mods.super) {
             result = try win.printSegment(.{ .text = "super", .style = super_style }, .{ .col_offset = result.col });
             result = try win.printSegment(.{ .text = " + " }, .{ .col_offset = result.col });
diff --git a/src/config/Config.zig b/src/config/Config.zig
index a4b1e0a21..b8a8b43ac 100644
--- a/src/config/Config.zig
+++ b/src/config/Config.zig
@@ -670,22 +670,13 @@ class: ?[:0]const u8 = null,
 ///     translated by any system keyboard layouts. Example: "ctrl+physical:a"
 ///
 /// Valid modifiers are `shift`, `ctrl` (alias: `control`), `alt` (alias: `opt`,
-/// `option`), `super` (alias: `cmd`, `command`), and `function` (alias: `fn`,
-/// `globe`). You may use the modifier or the alias. When debugging keybinds,
-/// the non-aliased modifier will always be used in output.
+/// `option`), and `super` (alias: `cmd`, `command`). You may use the modifier
+/// or the alias. When debugging keybinds, the non-aliased modifier will always
+/// be used in output.
 ///
-/// Some notes about the `function` modifier:
-///
-///   * It is only available on macOS.
-///   * It is used by many system shortcuts and Ghostty is not able to
-///     override these shortcuts. If a system shortcut is triggered, the
-///     system shortcut will take precedence.
-///   * If you have multiple keyboard layouts active and don't press the
-///     combination fast enough, macOS will switch to the next keyboard
-///     layout.
-///   * Menu items on macOS cannot be bound to the `function` modifier,
-///     so this modifier will work with Ghostty but will not be visible
-///     in the menu.
+/// Note that the fn or "globe" key on keyboards are not supported as a
+/// modifier. This is a limitation of the operating systems and GUI toolkits
+/// that Ghostty uses.
 ///
 /// You may also specify multiple triggers separated by `>` to require a
 /// sequence of triggers to activate the action. For example,
diff --git a/src/input/Binding.zig b/src/input/Binding.zig
index 1d0e26b9e..dead84c9f 100644
--- a/src/input/Binding.zig
+++ b/src/input/Binding.zig
@@ -901,8 +901,6 @@ pub const Trigger = struct {
                 .{ "opt", "alt" },
                 .{ "option", "alt" },
                 .{ "control", "ctrl" },
-                .{ "fn", "function" },
-                .{ "globe", "function" },
             };
             inline for (alias_mods) |pair| {
                 if (std.mem.eql(u8, part, pair[0])) {
diff --git a/src/input/KeyEncoder.zig b/src/input/KeyEncoder.zig
index 9236eacec..25d85e78d 100644
--- a/src/input/KeyEncoder.zig
+++ b/src/input/KeyEncoder.zig
@@ -35,8 +35,6 @@ pub fn encode(
     self: *const KeyEncoder,
     buf: []u8,
 ) ![]const u8 {
-    // log.debug("encode {}", .{self.*});
-
     if (self.kitty_flags.int() != 0) return try self.kitty(buf);
     return try self.legacy(buf);
 }
diff --git a/src/input/key.zig b/src/input/key.zig
index 30e61334f..8fc7c6f20 100644
--- a/src/input/key.zig
+++ b/src/input/key.zig
@@ -89,11 +89,10 @@ pub const Mods = packed struct(Mods.Backing) {
     ctrl: bool = false,
     alt: bool = false,
     super: bool = false,
-    function: bool = false,
     caps_lock: bool = false,
     num_lock: bool = false,
     sides: side = .{},
-    _padding: u5 = 0,
+    _padding: u6 = 0,
 
     /// Tracks the side that is active for any given modifier. Note
     /// that this doesn't confirm a modifier is pressed; you must check
@@ -131,7 +130,6 @@ pub const Mods = packed struct(Mods.Backing) {
             .ctrl = self.ctrl,
             .alt = self.alt,
             .super = self.super,
-            .function = self.function,
         };
     }