diff --git a/cli/help.md b/cli/help.md
index 49cee04a0e8..8e56949ad76 100644
--- a/cli/help.md
+++ b/cli/help.md
@@ -54,6 +54,7 @@ Basic options:
 --no-stdin                  do not read "-" from stdin
 --no-strict                 Don't emit `"use strict";` in the generated modules
 --strictDeprecations        Throw errors for deprecated features
+--systemNullSetters         Replace empty SystemJS setters with `null`
 --no-treeshake              Disable tree-shaking optimisations
 --no-treeshake.annotations  Ignore pure call annotations
 --no-treeshake.moduleSideEffects Assume modules have no side-effects
diff --git a/docs/01-command-line-reference.md b/docs/01-command-line-reference.md
index d0c8ee205fb..857cb753e82 100755
--- a/docs/01-command-line-reference.md
+++ b/docs/01-command-line-reference.md
@@ -93,7 +93,8 @@ export default { // can be an array (for multiple inputs)
     namespaceToStringTag,
     noConflict,
     preferConst,
-    strict
+    strict,
+    systemNullSetters
   },
 
   watch: {
@@ -310,6 +311,7 @@ Many options have command line equivalents. In those cases, any arguments passed
 --no-stdin                  do not read "-" from stdin
 --no-strict                 Don't emit `"use strict";` in the generated modules
 --strictDeprecations        Throw errors for deprecated features
+--systemNullSetters         Replace empty SystemJS setters with `null`
 --no-treeshake              Disable tree-shaking optimisations
 --no-treeshake.annotations  Ignore pure call annotations
 --no-treeshake.moduleSideEffects Assume modules have no side-effects
diff --git a/docs/999-big-list-of-options.md b/docs/999-big-list-of-options.md
index 05d99762c3d..06cd42f2762 100755
--- a/docs/999-big-list-of-options.md
+++ b/docs/999-big-list-of-options.md
@@ -1047,7 +1047,7 @@ Whether to include the 'use strict' pragma at the top of generated non-ES bundle
 
 #### output.systemNullSetters
 Type: `boolean`<br>
-CLI: `--systemNullSetters`<br>
+CLI: `--systemNullSetters`/`--no-systemNullSetters`<br>
 Default: `false`
 
 When outputting the `system` module format, this will replace empty setter functions with `null` as an output simplification. This is *only supported in SystemJS 6.3.3 and above*.
diff --git a/src/rollup/types.d.ts b/src/rollup/types.d.ts
index 6431603f230..1cb03cde7a8 100644
--- a/src/rollup/types.d.ts
+++ b/src/rollup/types.d.ts
@@ -609,6 +609,7 @@ export interface NormalizedOutputOptions {
 	sourcemapFile: string | undefined;
 	sourcemapPathTransform: ((sourcePath: string) => string) | undefined;
 	strict: boolean;
+	systemNullSetters: boolean;
 }
 
 export type WarningHandlerWithDefault = (
diff --git a/src/utils/options/mergeOptions.ts b/src/utils/options/mergeOptions.ts
index d7d53ffee89..ed10df3f63f 100644
--- a/src/utils/options/mergeOptions.ts
+++ b/src/utils/options/mergeOptions.ts
@@ -217,7 +217,8 @@ function mergeOutputOptions(
 		sourcemapExcludeSources: getOption('sourcemapExcludeSources'),
 		sourcemapFile: getOption('sourcemapFile'),
 		sourcemapPathTransform: getOption('sourcemapPathTransform'),
-		strict: getOption('strict')
+		strict: getOption('strict'),
+		systemNullSetters: getOption('systemNullSetters')
 	};
 
 	warnUnknownOptions(config, Object.keys(outputOptions), 'output options', warn);
diff --git a/src/utils/options/normalizeOutputOptions.ts b/src/utils/options/normalizeOutputOptions.ts
index 26375b45352..9a955d0c7a2 100644
--- a/src/utils/options/normalizeOutputOptions.ts
+++ b/src/utils/options/normalizeOutputOptions.ts
@@ -59,7 +59,8 @@ export function normalizeOutputOptions(
 		sourcemapPathTransform: config.sourcemapPathTransform as
 			| ((sourcePath: string) => string)
 			| undefined,
-		strict: (config.strict as boolean | undefined) ?? true
+		strict: (config.strict as boolean | undefined) ?? true,
+		systemNullSetters: (config.systemNullSetters as boolean | undefined) || false
 	};
 
 	warnUnknownOptions(config, Object.keys(outputOptions), 'output options', inputOptions.onwarn);
diff --git a/test/hooks/index.js b/test/hooks/index.js
index b7df8ef8e40..beda0d0c368 100644
--- a/test/hooks/index.js
+++ b/test/hooks/index.js
@@ -65,7 +65,8 @@ describe('hooks', () => {
 								preferConst: false,
 								sourcemap: false,
 								sourcemapExcludeSources: false,
-								strict: true
+								strict: true,
+								systemNullSetters: false
 							});
 							assert.strictEqual(options.banner(), 'new banner');
 						},