diff --git a/packages/math-input/src/components/i18n-context.tsx b/packages/math-input/src/components/i18n-context.tsx
index 582f982ffa..bf8110e0c0 100644
--- a/packages/math-input/src/components/i18n-context.tsx
+++ b/packages/math-input/src/components/i18n-context.tsx
@@ -18,7 +18,7 @@ type I18nContextType = {
 // @ts-expect-error - TS2322 - Type 'Context<{ strings: {}; locale: string; }>' is not assignable to type 'Context<I18nContextType>'.
 export const MathInputI18nContext: React.Context<I18nContextType> =
     React.createContext(
-        process.env.NODE_ENV === "test" || process.env.STORYBOOK
+        process?.env?.NODE_ENV === "test" || process?.env?.STORYBOOK
             ? {
                   strings: mockStrings,
                   locale: "en",
diff --git a/packages/perseus/src/components/i18n-context.tsx b/packages/perseus/src/components/i18n-context.tsx
index 26b72cb592..10ded6ae75 100644
--- a/packages/perseus/src/components/i18n-context.tsx
+++ b/packages/perseus/src/components/i18n-context.tsx
@@ -18,7 +18,7 @@ type I18nContextType = {
 // @ts-expect-error - TS2322 - Type 'Context<{ strings: {}; locale: string; }>' is not assignable to type 'Context<I18nContextType>'.
 export const PerseusI18nContext: React.Context<I18nContextType> =
     React.createContext(
-        process.env.NODE_ENV === "test" || process.env.STORYBOOK
+        process?.env?.NODE_ENV === "test" || process?.env?.STORYBOOK
             ? {
                   strings: mockStrings,
                   locale: "en",