diff --git a/.changeset/petite-ravens-see.md b/.changeset/petite-ravens-see.md
new file mode 100644
index 00000000000..f1904d1c1cc
--- /dev/null
+++ b/.changeset/petite-ravens-see.md
@@ -0,0 +1,5 @@
+---
+'@clerk/clerk-js': patch
+---
+
+Do not allow `setActive({ organization: null })` when organization selection is forced
diff --git a/packages/clerk-js/bundlewatch.config.json b/packages/clerk-js/bundlewatch.config.json
index 99fc246158c..a446de1a2ba 100644
--- a/packages/clerk-js/bundlewatch.config.json
+++ b/packages/clerk-js/bundlewatch.config.json
@@ -3,7 +3,7 @@
     { "path": "./dist/clerk.js", "maxSize": "605kB" },
     { "path": "./dist/clerk.browser.js", "maxSize": "69.2KB" },
     { "path": "./dist/clerk.legacy.browser.js", "maxSize": "113KB" },
-    { "path": "./dist/clerk.headless*.js", "maxSize": "52.2KB" },
+    { "path": "./dist/clerk.headless*.js", "maxSize": "53KB" },
     { "path": "./dist/ui-common*.js", "maxSize": "106.3KB" },
     { "path": "./dist/vendors*.js", "maxSize": "40.2KB" },
     { "path": "./dist/coinbase*.js", "maxSize": "38KB" },
diff --git a/packages/clerk-js/src/core/clerk.ts b/packages/clerk-js/src/core/clerk.ts
index ee9cc5a5b18..7d3c26de64a 100644
--- a/packages/clerk-js/src/core/clerk.ts
+++ b/packages/clerk-js/src/core/clerk.ts
@@ -1071,6 +1071,10 @@ export class Clerk implements ClerkInterface {
         );
       }
 
+      if (organization === null && this.environment?.organizationSettings?.forceOrganizationSelection) {
+        throw new Error('setActive requires an organization parameter when organization selection is forced.');
+      }
+
       const onBeforeSetActive: SetActiveHook =
         typeof window !== 'undefined' && typeof window.__unstable__onBeforeSetActive === 'function'
           ? window.__unstable__onBeforeSetActive