diff --git a/app/src/main/java/uk/gov/android/authentication/integrity/appcheck/AppChecker.kt b/app/src/main/java/uk/gov/android/authentication/integrity/appcheck/AppChecker.kt
index 6415fbe..ef3d09b 100644
--- a/app/src/main/java/uk/gov/android/authentication/integrity/appcheck/AppChecker.kt
+++ b/app/src/main/java/uk/gov/android/authentication/integrity/appcheck/AppChecker.kt
@@ -2,6 +2,6 @@ package uk.gov.android.authentication.integrity.appcheck
 
 import uk.gov.android.authentication.integrity.model.AppCheckToken
 
-interface AppChecker {
+fun interface AppChecker {
     suspend fun getAppCheckToken(): Result<AppCheckToken>
 }