diff --git a/src/main/java/com/vinted/kafka/connect/vespa/feeders/VespaFeederHandler.java b/src/main/java/com/vinted/kafka/connect/vespa/feeders/VespaFeederHandler.java
index 627cd27..c28c7ff 100644
--- a/src/main/java/com/vinted/kafka/connect/vespa/feeders/VespaFeederHandler.java
+++ b/src/main/java/com/vinted/kafka/connect/vespa/feeders/VespaFeederHandler.java
@@ -3,7 +3,6 @@
 import ai.vespa.feed.client.DocumentId;
 import ai.vespa.feed.client.OperationParseException;
 import ai.vespa.feed.client.Result;
-import ai.vespa.feed.client.ResultParseException;
 import com.fasterxml.jackson.core.JsonParseException;
 import com.vinted.kafka.connect.vespa.VespaReporter;
 import com.vinted.kafka.connect.vespa.VespaSinkConfig;
@@ -107,11 +106,11 @@ private static boolean isMalformed(Throwable throwable) {
                 .findFirst()
                 .orElse(throwable);
 
-        String rootCauseString = rootCause.toString().toLowerCase();
+        String throwableString = throwable.toString().toLowerCase();
 
-        return !(rootCause instanceof ResultParseException)
-                && (rootCauseString.contains("status 400")
-                || rootCauseString.contains("string field value contains illegal code point")
+        return !(throwableString.contains("resultparseexception"))
+                && (throwableString.contains("status 400")
+                || throwableString.contains("string field value contains illegal code point")
                 || rootCause instanceof OperationParseException
                 || rootCause instanceof JsonParseException);
     }