diff --git a/CHANGELOG.md b/CHANGELOG.md
index c02ba7f3..4de48bcd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- issue with overwriting `google.ima` value if it was already set
+  [#331](https://github.com/AdguardTeam/Scriptlets/issues/331)
 - issue with printing unnecessary logs to the console in `log-addEventListener` scriptlet
   [#335](https://github.com/AdguardTeam/Scriptlets/issues/335)
 - error throwing in `prevent-fetch` and `prevent-xhr` scriptlets when a request is blocked
diff --git a/src/redirects/google-ima3.js b/src/redirects/google-ima3.js
index d97f2607..ef847274 100644
--- a/src/redirects/google-ima3.js
+++ b/src/redirects/google-ima3.js
@@ -479,6 +479,15 @@ export function GoogleIma3(source) {
         window.google = {};
     }
 
+    // Workaround for https://github.com/AdguardTeam/Scriptlets/issues/331
+    // To avoid conflicts with the DAI SDK, we need to make sure that the
+    // google.ima.dai namespace is not overwritten.
+    // TODO: Later we should create a mock for the DAI SDK as well.
+    // See https://github.com/AdguardTeam/Scriptlets/issues/239
+    if (window.google.ima?.dai) {
+        ima.dai = window.google.ima.dai;
+    }
+
     window.google.ima = ima;
 
     hit(source);
diff --git a/tests/redirects/google-ima3.test.js b/tests/redirects/google-ima3.test.js
index 23f7a8a3..0e7d8815 100644
--- a/tests/redirects/google-ima3.test.js
+++ b/tests/redirects/google-ima3.test.js
@@ -87,3 +87,30 @@ test('Ima - run requestAds function twice', (assert) => {
         done();
     });
 });
+
+// https://github.com/AdguardTeam/Scriptlets/issues/331
+test('Ima - check if DAI API is not discarded by the redirect', (assert) => {
+    // Define some dummy DAI API which cannot be discarded by the redirect
+    window.google = {
+        ima: {
+            // should be kept
+            dai: {
+                api: {
+                    foo: 'bar',
+                },
+            },
+            // should be discarded
+            bar: 'foo',
+        },
+    };
+
+    runRedirect(name);
+
+    // check if DAI API is not discarded by the redirect
+    assert.ok(window.google.ima.dai, 'window.google.ima.dai exists');
+    assert.ok(window.google.ima.dai.api, 'window.google.ima.dai.api exists');
+    assert.strictEqual(window.google.ima.dai.api.foo, 'bar', 'window.google.ima.dai.api.foo is equal to "bar"');
+
+    // other properties should be discarded
+    assert.strictEqual(window.google.ima.bar, undefined, 'window.google.ima.bar is undefined');
+});