diff --git a/packages/react-strict-dom/src/native/stylex/CSSLengthUnitValue.js b/packages/react-strict-dom/src/native/stylex/CSSLengthUnitValue.js
index 8e64ecd5..ac0b2158 100644
--- a/packages/react-strict-dom/src/native/stylex/CSSLengthUnitValue.js
+++ b/packages/react-strict-dom/src/native/stylex/CSSLengthUnitValue.js
@@ -57,7 +57,7 @@ export class CSSLengthUnitValue {
       fontScale = 1,
       inheritedFontSize,
       viewportHeight,
-      viewportScale,
+      viewportScale = 1,
       viewportWidth
     } = options;
     const unit = this.unit;
diff --git a/packages/react-strict-dom/src/native/stylex/CSSTransformValue.js b/packages/react-strict-dom/src/native/stylex/CSSTransformValue.js
index 70c6d30c..5edb3a51 100644
--- a/packages/react-strict-dom/src/native/stylex/CSSTransformValue.js
+++ b/packages/react-strict-dom/src/native/stylex/CSSTransformValue.js
@@ -21,7 +21,7 @@ export class CSSTransformValue {
   }
 
   resolveTransformValue(
-    viewportScale: number
+    viewportScale?: number = 1
   ): $ReadOnlyArray<ReactNativeTransform> {
     if (viewportScale === 1) {
       return this.value;
diff --git a/packages/react-strict-dom/src/native/stylex/__tests__/parseTransform-test.js b/packages/react-strict-dom/src/native/stylex/__tests__/parseTransform-test.js
index e9eff5e4..cdf1f8cb 100644
--- a/packages/react-strict-dom/src/native/stylex/__tests__/parseTransform-test.js
+++ b/packages/react-strict-dom/src/native/stylex/__tests__/parseTransform-test.js
@@ -8,7 +8,7 @@
 import { parseTransform as parseTransformImpl } from '../parseTransform';
 
 function parseTransform(transform) {
-  return parseTransformImpl(transform).resolveTransformValue(1);
+  return parseTransformImpl(transform).resolveTransformValue();
 }
 
 describe('parseTransform', () => {
diff --git a/packages/react-strict-dom/src/native/stylex/index.js b/packages/react-strict-dom/src/native/stylex/index.js
index 47dc3e83..dc71781c 100644
--- a/packages/react-strict-dom/src/native/stylex/index.js
+++ b/packages/react-strict-dom/src/native/stylex/index.js
@@ -46,7 +46,7 @@ type ResolveStyleOptions = $ReadOnly<{
   hover?: ?boolean,
   inheritedFontSize: ?number,
   viewportHeight: number,
-  viewportScale: number,
+  viewportScale: number | void,
   viewportWidth: number,
   writingDirection?: ?'ltr' | 'rtl'
 }>;
@@ -298,7 +298,7 @@ function resolveStyle(
     hover,
     inheritedFontSize,
     viewportHeight,
-    viewportScale,
+    viewportScale = 1,
     viewportWidth
   } = options;
   const colorScheme = options.colorScheme || 'light';
diff --git a/packages/react-strict-dom/tests/css-test.native.js b/packages/react-strict-dom/tests/css-test.native.js
index 5af3b6ea..e1b52a48 100644
--- a/packages/react-strict-dom/tests/css-test.native.js
+++ b/packages/react-strict-dom/tests/css-test.native.js
@@ -10,8 +10,7 @@ import { css } from 'react-strict-dom';
 const mockOptions = {
   hover: false,
   viewportHeight: 600,
-  viewportWidth: 320,
-  viewportScale: 1
+  viewportWidth: 320
 };
 
 /**
@@ -1732,8 +1731,7 @@ expect.extend({
     const theProps = css.props.call(
       {
         viewportHeight: height,
-        viewportWidth: width,
-        viewportScale: 1
+        viewportWidth: width
       },
       underTest
     );