diff --git a/spec/store/core/add-spec.js b/spec/store/core/add-spec.js
index a67d863..5591f54 100644
--- a/spec/store/core/add-spec.js
+++ b/spec/store/core/add-spec.js
@@ -398,6 +398,28 @@ describe("add", function() {
       expect(store.find("products", "45").category).toBe(null);
     });
 
+    it("must use the type's name as a fallback for relationship names when adding resources", function () {
+      store.define("categories", {
+        products: Store.hasMany()
+      });
+      store.define("products", {
+        categories: Store.hasMany()
+      });
+      store.add({
+        "type": "categories",
+        "id": "37",
+        "relationships": {
+          "products": {
+            "data": [
+              { "type": "products", "id": "23" }
+            ]
+          }
+        }
+      });
+      expect(store.find("categories", "37").products).toHaveIds([ "23" ]);
+      expect(store.find("products", "23").categories).toHaveIds([ "37" ]);
+    });
+
   });
 
 });
diff --git a/src/store.js b/src/store.js
index 6ac0e4a..6ca1000 100644
--- a/src/store.js
+++ b/src/store.js
@@ -244,7 +244,7 @@ export default class Store {
 
   _addInverseRelationship(sourceResource, sourceFieldName, targetResource, sourceField) {
     var targetDefinition = this._types[targetResource.type];
-    var targetFieldName = sourceField.inverse || targetResource.type;
+    var targetFieldName = sourceField.inverse || sourceResource.type;
     var targetField = targetDefinition && targetDefinition[targetFieldName];
     targetResource._dependents.push({ type: sourceResource.type, id: sourceResource.id, fieldName: sourceFieldName });
     if (targetField) {
@@ -293,7 +293,7 @@ export default class Store {
 
   _removeInverseRelationship(sourceResource, sourceFieldName, targetResource, sourceField) {
     var targetDefinition = this._types[targetResource.type];
-    var targetFieldName = sourceField.inverse || targetResource.type;
+    var targetFieldName = sourceField.inverse || sourceResource.type;
     var targetField = targetDefinition && targetDefinition[targetFieldName];
     targetResource._dependents = targetResource._dependents.filter(r => {
       return !(r.type === sourceResource.type && r.id === sourceResource.id && r.fieldName === sourceFieldName);