diff --git a/modules/examples/lnl.nix b/modules/examples/lnl.nix
index 2edf6cb..96954d2 100644
--- a/modules/examples/lnl.nix
+++ b/modules/examples/lnl.nix
@@ -10,6 +10,7 @@
   system.defaults.NSGlobalDomain.InitialKeyRepeat = 10;
   system.defaults.NSGlobalDomain.KeyRepeat = 1;
   system.defaults.NSGlobalDomain.NSAutomaticCapitalizationEnabled = false;
+  system.defaults.NSGlobalDomain.NSAutomaticInlinePredictionEnabled = false;
   system.defaults.NSGlobalDomain.NSAutomaticDashSubstitutionEnabled = false;
   system.defaults.NSGlobalDomain.NSAutomaticPeriodSubstitutionEnabled = false;
   system.defaults.NSGlobalDomain.NSAutomaticQuoteSubstitutionEnabled = false;
diff --git a/modules/system/defaults/NSGlobalDomain.nix b/modules/system/defaults/NSGlobalDomain.nix
index 9eb31d5..6dcedca 100644
--- a/modules/system/defaults/NSGlobalDomain.nix
+++ b/modules/system/defaults/NSGlobalDomain.nix
@@ -7,7 +7,6 @@ let
   inherit (config.lib.defaults.types) floatWithDeprecationError;
 in {
   options = {
-
     system.defaults.NSGlobalDomain.AppleShowAllFiles = mkOption {
       type = types.nullOr types.bool;
       default = null;
@@ -104,6 +103,14 @@ in {
       '';
     };
 
+    system.defaults.NSGlobalDomain.NSAutomaticInlinePredictionEnabled = mkOption {
+      type = types.nullOr types.bool;
+      default = null;
+      description = ''
+        Whether to enable inline predictive text.  The default is true.
+      '';
+    };
+
     system.defaults.NSGlobalDomain.NSAutomaticDashSubstitutionEnabled = mkOption {
       type = types.nullOr types.bool;
       default = null;
diff --git a/tests/fixtures/system-defaults-write/activate-user.txt b/tests/fixtures/system-defaults-write/activate-user.txt
index 1650e21..d324a8d 100644
--- a/tests/fixtures/system-defaults-write/activate-user.txt
+++ b/tests/fixtures/system-defaults-write/activate-user.txt
@@ -73,6 +73,11 @@ defaults write -g 'NSAutomaticDashSubstitutionEnabled' $'<?xml version="1.0" enc
 <plist version="1.0">
 <false/>
 </plist>'
+defaults write -g 'NSAutomaticInlinePredictionEnabled' $'<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<false/>
+</plist>'
 defaults write -g 'NSAutomaticPeriodSubstitutionEnabled' $'<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
diff --git a/tests/system-defaults-write.nix b/tests/system-defaults-write.nix
index 7624bba..6a95b55 100644
--- a/tests/system-defaults-write.nix
+++ b/tests/system-defaults-write.nix
@@ -12,6 +12,7 @@
   system.defaults.NSGlobalDomain.AppleShowScrollBars = "Always";
   system.defaults.NSGlobalDomain.AppleScrollerPagingBehavior = true;
   system.defaults.NSGlobalDomain.NSAutomaticCapitalizationEnabled = false;
+  system.defaults.NSGlobalDomain.NSAutomaticInlinePredictionEnabled = false;
   system.defaults.NSGlobalDomain.NSAutomaticDashSubstitutionEnabled = false;
   system.defaults.NSGlobalDomain.NSAutomaticPeriodSubstitutionEnabled = false;
   system.defaults.NSGlobalDomain.NSAutomaticQuoteSubstitutionEnabled = false;