diff --git a/utils/build_swift/build_swift/driver_arguments.py b/utils/build_swift/build_swift/driver_arguments.py
index e6aa044e91e90..ea2e76367fde2 100644
--- a/utils/build_swift/build_swift/driver_arguments.py
+++ b/utils/build_swift/build_swift/driver_arguments.py
@@ -662,8 +662,9 @@ def create_argument_parser():
     option(['--swiftsyntax'], toggle_true('build_swiftsyntax'),
            help='build swiftSyntax')
 
-    option(['--early-swiftsyntax'], toggle_true('build_early_swiftsyntax'),
-           help='build early SwiftSyntax')
+    option(['--skip-early-swiftsyntax'],
+           toggle_false('build_early_swiftsyntax'),
+           help='skip building early SwiftSyntax')
 
     option(['--skstresstester'], toggle_true('build_skstresstester'),
            help='build the SourceKit stress tester')
diff --git a/utils/build_swift/tests/expected_options.py b/utils/build_swift/tests/expected_options.py
index 4ad7df53a587d..ab2b7c862d899 100644
--- a/utils/build_swift/tests/expected_options.py
+++ b/utils/build_swift/tests/expected_options.py
@@ -90,7 +90,7 @@
     'build_swiftpm': False,
     'build_swift_driver': False,
     'build_early_swift_driver': True,
-    'build_early_swiftsyntax': False,
+    'build_early_swiftsyntax': True,
     'build_swiftsyntax': False,
     'build_libparser_only': False,
     'build_skstresstester': False,
@@ -519,7 +519,6 @@ class BuildScriptImplOption(_BaseOption):
     SetTrueOption('--skip-build'),
     SetTrueOption('--swiftpm', dest='build_swiftpm'),
     SetTrueOption('--swift-driver', dest='build_swift_driver'),
-    SetTrueOption('--early-swiftsyntax', dest='build_early_swiftsyntax'),
     SetTrueOption('--swiftsyntax', dest='build_swiftsyntax'),
     SetTrueOption('--build-libparser-only', dest='build_libparser_only'),
     SetTrueOption('--skstresstester', dest='build_skstresstester'),
@@ -637,6 +636,7 @@ class BuildScriptImplOption(_BaseOption):
     DisableOption('--skip-clean-xctest', dest='clean_xctest'),
     DisableOption('--skip-clean-llbuild', dest='clean_llbuild'),
     DisableOption('--skip-early-swift-driver', dest='build_early_swift_driver'),
+    DisableOption('--skip-early-swiftsyntax', dest='build_early_swiftsyntax'),
     DisableOption('--skip-clean-swiftpm', dest='clean_swiftpm'),
     DisableOption('--skip-clean-swift-driver', dest='clean_swift_driver'),
     DisableOption('--skip-test-android', dest='test_android'),