diff --git a/package.json b/package.json
index 452b3c1..2bbd4a6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nicky-lenaers/mogr",
-  "version": "1.6.0",
+  "version": "1.6.1",
   "description": "MoGr dynamically maps GraphQL AST's to Mongoose Query Projection and/or Population and provides GraphQL Cursor Pagination.",
   "main": "lib/index.js",
   "scripts": {
diff --git a/src/registry.ts b/src/registry.ts
index dff9921..30aaef2 100644
--- a/src/registry.ts
+++ b/src/registry.ts
@@ -183,6 +183,10 @@ export class Registry {
     fields: PopulatableField[] = []
   ): PopulatableField[] {
 
+    if (!type) {
+      return []
+    }
+
     if (type.ref && typeof type.ref === 'string') {
 
       if (!fields.map(field => field.path).includes(path)) {