diff --git a/packages/replace/test/types.ts b/packages/replace/test/types.ts
index 20f55160e..28197d689 100755
--- a/packages/replace/test/types.ts
+++ b/packages/replace/test/types.ts
@@ -16,6 +16,7 @@ const config: RollupOptions = {
       include: 'config.js',
       exclude: 'node_modules/**',
       delimiters: ['<@', '@>'],
+      preventAssignment: true,
       VERSION: '1.0.0',
       ENVIRONMENT: JSON.stringify('development'),
       __dirname: (id) => `'${dirname(id)}'`,
diff --git a/packages/replace/types/index.d.ts b/packages/replace/types/index.d.ts
index 642a8c10f..3fe238fd1 100755
--- a/packages/replace/types/index.d.ts
+++ b/packages/replace/types/index.d.ts
@@ -8,7 +8,11 @@ export interface RollupReplaceOptions {
    * All other options are treated as `string: replacement` replacers,
    * or `string: (id) => replacement` functions.
    */
-  [str: string]: Replacement | RollupReplaceOptions['include'] | RollupReplaceOptions['values'];
+  [str: string]:
+    | Replacement
+    | RollupReplaceOptions['include']
+    | RollupReplaceOptions['values']
+    | RollupReplaceOptions['preventAssignment'];
 
   /**
    * A minimatch pattern, or array of patterns, of files that should be
@@ -24,6 +28,11 @@ export interface RollupReplaceOptions {
    * of `foo`, supply delimiters
    */
   delimiters?: [string, string];
+  /**
+   * Prevents replacing strings where they are followed by a single equals
+   * sign.
+   */
+  preventAssignment?: boolean;
   /**
    * You can separate values to replace from other options.
    */