diff --git a/lib/src/androidTest/kotlin/at/bitfire/ical4android/JtxICalObjectTest.kt b/lib/src/androidTest/kotlin/at/bitfire/ical4android/JtxICalObjectTest.kt
index 2015768e..2232b355 100644
--- a/lib/src/androidTest/kotlin/at/bitfire/ical4android/JtxICalObjectTest.kt
+++ b/lib/src/androidTest/kotlin/at/bitfire/ical4android/JtxICalObjectTest.kt
@@ -811,6 +811,7 @@ class JtxICalObjectTest {
     @Test fun check_input_equals_output_vtodo_rfc5545_sample() = compare_properties("jtx/vtodo/rfc5545-sample1.ics", null)
     @Test fun check_input_equals_output_vtodo_empty_priority() = compare_properties("jtx/vtodo/empty-priority.ics", null)
     @Test fun check_input_equals_output_vtodo_latin1() = compare_properties("jtx/vtodo/latin1.ics", null)
+    @Test fun check_input_equals_output_vtodo_attach() = compare_properties("jtx/vtodo/attach.ics", null)
 
     // VJOURNAL
     @Test fun check_input_equals_output_vjournal_default_example() = compare_properties("jtx/vjournal/default-example.ics", null)
diff --git a/lib/src/androidTest/resources/jtx/vtodo/attach.ics b/lib/src/androidTest/resources/jtx/vtodo/attach.ics
new file mode 100644
index 00000000..9a64e141
--- /dev/null
+++ b/lib/src/androidTest/resources/jtx/vtodo/attach.ics
@@ -0,0 +1,10 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+BEGIN:VTODO
+UID:attach-test
+DTSTAMP:20150826T132300Z
+SUMMARY:irrelevant
+DTSTART:20131009T170000T
+ATTACH:https://domain.example/image.jpeg
+END:VTODO
+END:VCALENDAR
diff --git a/lib/src/main/kotlin/at/bitfire/ical4android/JtxICalObject.kt b/lib/src/main/kotlin/at/bitfire/ical4android/JtxICalObject.kt
index e50cd36e..8c7c2395 100644
--- a/lib/src/main/kotlin/at/bitfire/ical4android/JtxICalObject.kt
+++ b/lib/src/main/kotlin/at/bitfire/ical4android/JtxICalObject.kt
@@ -501,7 +501,7 @@ open class JtxICalObject(
                     is Attach -> {
                         val attachment = Attachment()
                         prop.uri?.let { attachment.uri = it.toString() }
-                        prop.binary.array().let {
+                        prop.binary?.array()?.let {
                             attachment.binary = Base64.encodeToString(it, Base64.DEFAULT)
                         }
                         prop.getParameter<FmtType>(Parameter.FMTTYPE)?.getOrNull()?.let {