diff --git a/fints4javaLib/src/main/kotlin/net/dankito/fints/response/ResponseParser.kt b/fints4javaLib/src/main/kotlin/net/dankito/fints/response/ResponseParser.kt
index 057327e7..548938fc 100644
--- a/fints4javaLib/src/main/kotlin/net/dankito/fints/response/ResponseParser.kt
+++ b/fints4javaLib/src/main/kotlin/net/dankito/fints/response/ResponseParser.kt
@@ -296,7 +296,7 @@ open class ResponseParser @JvmOverloads constructor(
             parseCodeEnum(procedureDataElements[17], Initialisierungsmodus.values()),
             parseCodeEnum(procedureDataElements[18], BezeichnungDesTanMediumsErforderlich.values()),
             parseBoolean(procedureDataElements[19]),
-            if (procedureDataElements.size >= 20) parseNullableInt(procedureDataElements[20]) else null
+            if (procedureDataElements.size > 20) parseNullableInt(procedureDataElements[20]) else null
         )
     }