diff --git a/core/datastore/src/main/java/com/google/samples/apps/nowinandroid/core/datastore/NiaPreferencesDataSource.kt b/core/datastore/src/main/java/com/google/samples/apps/nowinandroid/core/datastore/NiaPreferencesDataSource.kt
index b4442528c..0f0931e6b 100644
--- a/core/datastore/src/main/java/com/google/samples/apps/nowinandroid/core/datastore/NiaPreferencesDataSource.kt
+++ b/core/datastore/src/main/java/com/google/samples/apps/nowinandroid/core/datastore/NiaPreferencesDataSource.kt
@@ -203,7 +203,7 @@ class NiaPreferencesDataSource @Inject constructor(
     }
 }
 
-fun UserPreferencesKt.Dsl.updateShouldHideOnboardingIfNecessary() {
+private fun UserPreferencesKt.Dsl.updateShouldHideOnboardingIfNecessary() {
 
     if (followedTopicIds.isEmpty() && followedAuthorIds.isEmpty()) {
         shouldHideOnboarding = false