diff --git a/rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/JsonPropertyEditorRegistrator.java b/rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/JsonPropertyEditorRegistrator.java
index c3afd3564..0dfde34c7 100644
--- a/rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/JsonPropertyEditorRegistrator.java
+++ b/rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/JsonPropertyEditorRegistrator.java
@@ -7,6 +7,7 @@ import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.InitBinder;
 
 import pro.taskana.monitor.rest.models.PriorityColumnHeaderRepresentationModel;
+import pro.taskana.task.api.models.ObjectReference;
 
 @ControllerAdvice
 public class JsonPropertyEditorRegistrator {
@@ -23,5 +24,7 @@ public class JsonPropertyEditorRegistrator {
     binder.registerCustomEditor(
         PriorityColumnHeaderRepresentationModel.class,
         new JsonPropertyEditor(objectMapper, PriorityColumnHeaderRepresentationModel.class));
+    binder.registerCustomEditor(
+        ObjectReference.class, new JsonPropertyEditor(objectMapper, ObjectReference.class));
   }
 }
diff --git a/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java b/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java
index a8bd3ae51..c93023476 100644
--- a/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java
+++ b/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java
@@ -9,6 +9,7 @@ import java.io.BufferedWriter;
 import java.io.OutputStreamWriter;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.net.URLEncoder;
 import java.time.Instant;
 import java.time.temporal.ChronoUnit;
 import java.util.Arrays;
@@ -222,6 +223,22 @@ class TaskControllerIntTest {
     assertThat(response.getBody().getContent()).hasSize(22);
   }
 
+  @Test
+  void should_ReturnAllTasks_For_ProvidedPrimaryObjectReference() throws Exception {
+    String url =
+        restHelper.toUrl(RestEndpoints.URL_TASKS)
+            + "?por="
+            + URLEncoder.encode(
+                "{\"systemInstance\":\"MyInstance1\",\"type\":\"MyType1\"}", "UTF-8");
+    HttpEntity<Object> auth = new HttpEntity<>(RestHelper.generateHeadersForUser("teamlead-1"));
+    ResponseEntity<TaskSummaryPagedRepresentationModel> response =
+        TEMPLATE.exchange(url, HttpMethod.GET, auth, TASK_SUMMARY_PAGE_MODEL_TYPE);
+    assertThat(response.getBody()).isNotNull();
+    assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+    assertThat((response.getBody()).getLink(IanaLinkRelations.SELF)).isNotNull();
+    assertThat(response.getBody().getContent()).hasSize(4);
+  }
+
   @Test
   void should_ReturnAllTasksByWildcardSearch_For_ProvidedSearchValue() {
     String url =