diff --git a/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/tracing/ui/TracingExplanationDialog.kt b/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/tracing/ui/TracingExplanationDialog.kt
index 7ebebc73a22e6aef5ae2753807fa505df2e42540..e5f992ed1a0b94b0c3bed9104ba16104e3c139d9 100644
--- a/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/tracing/ui/TracingExplanationDialog.kt
+++ b/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/tracing/ui/TracingExplanationDialog.kt
@@ -26,7 +26,7 @@ class TracingExplanationDialog @Inject constructor(
             message = "$infoPeriodLogged\n$infoPeriodLoggedAssessment\n\n$infoFAQ",
             positiveButton = context.getString(R.string.errors_generic_button_positive),
             negativeButton = null,
-            cancelable = null,
+            cancelable = false,
             positiveButtonFunction = onPositive,
             negativeButtonFunction = {}
         )