diff --git a/packages/twenty-server/src/engine/api/graphql/graphql-query-runner/graphql-query-parsers/graphql-query-filter/graphql-query-filter-field.parser.ts b/packages/twenty-server/src/engine/api/graphql/graphql-query-runner/graphql-query-parsers/graphql-query-filter/graphql-query-filter-field.parser.ts
index 0b867baae79..8e6a7a6eaae 100644
--- a/packages/twenty-server/src/engine/api/graphql/graphql-query-runner/graphql-query-parsers/graphql-query-filter/graphql-query-filter-field.parser.ts
+++ b/packages/twenty-server/src/engine/api/graphql/graphql-query-runner/graphql-query-parsers/graphql-query-filter/graphql-query-filter-field.parser.ts
@@ -69,6 +69,17 @@ export class GraphqlQueryFilterFieldParser {
         useDirectTableReference,
       );
     }
+
+    if (!isDefined(filterValue)) {
+      throw new GraphqlQueryRunnerException(
+        `Invalid filter value for field "${key}". Use { is: "NULL" } or { is: "NOT_NULL" } to filter on null values`,
+        GraphqlQueryRunnerExceptionCode.INVALID_QUERY_INPUT,
+        {
+          userFriendlyMessage: msg`Invalid filter value for field "${key}". Use { is: "NULL" } to filter on null values`,
+        },
+      );
+    }
+
     const [[operator, value]] = Object.entries(filterValue);
 
     if (