diff --git a/integration-tests/modules/__tests__/link-modules/define-link.spec.ts b/integration-tests/modules/__tests__/link-modules/define-link.spec.ts
index 551b536f36..2148b60d77 100644
--- a/integration-tests/modules/__tests__/link-modules/define-link.spec.ts
+++ b/integration-tests/modules/__tests__/link-modules/define-link.spec.ts
@@ -3,6 +3,7 @@ import { medusaIntegrationTestRunner } from "medusa-test-utils"
 import CurrencyModule from "@medusajs/currency"
 import { MedusaModule } from "@medusajs/modules-sdk"
 import RegionModule from "@medusajs/region"
+import ProductModule from "@medusajs/product"
 import { defineLink } from "@medusajs/utils"
 
 jest.setTimeout(50000)
@@ -92,6 +93,91 @@ medusaIntegrationTestRunner({
         })
       })
 
+      it("should generate a proper link definition with multi parts entity name", async () => {
+        const productVariantLinks = ProductModule.linkable
+        const regionLinks = RegionModule.linkable
+
+        const link = defineLink(
+          productVariantLinks.productVariant,
+          regionLinks.region
+        )
+
+        const linkDefinition = MedusaModule.getCustomLinks()
+          .map((linkDefinition: any) => {
+            const definition = linkDefinition(
+              MedusaModule.getAllJoinerConfigs()
+            )
+            return definition.serviceName === link.serviceName && definition
+          })
+          .filter(Boolean)[0]
+
+        expect(link.serviceName).toEqual(linkDefinition.serviceName)
+        expect(link.entryPoint).toEqual(linkDefinition.alias[0].name[0])
+        expect(linkDefinition).toEqual({
+          serviceName: "productProductVariantRegionRegionLink",
+          isLink: true,
+          alias: [
+            {
+              name: ["product_variant_region"],
+              args: {
+                entity: "LinkProductServiceProductVariantRegionRegion",
+              },
+            },
+          ],
+          primaryKeys: ["id", "product_variant_id", "region_id"],
+          relationships: [
+            {
+              serviceName: "productService",
+              primaryKey: "id",
+              foreignKey: "product_variant_id",
+              alias: "product_variant",
+              args: {
+                methodSuffix: "ProductVariants",
+              },
+              deleteCascade: false,
+            },
+            {
+              serviceName: "region",
+              primaryKey: "id",
+              foreignKey: "region_id",
+              alias: "region",
+              args: {
+                methodSuffix: "Regions",
+              },
+              deleteCascade: false,
+            },
+          ],
+          extends: [
+            {
+              serviceName: "productService",
+              fieldAlias: {
+                region: "region_link.region",
+              },
+              relationship: {
+                serviceName: "productProductVariantRegionRegionLink",
+                primaryKey: "product_variant_id",
+                foreignKey: "id",
+                alias: "region_link",
+                isList: false,
+              },
+            },
+            {
+              serviceName: "region",
+              fieldAlias: {
+                product_variant: "product_variant_link.product_variant",
+              },
+              relationship: {
+                serviceName: "productProductVariantRegionRegionLink",
+                primaryKey: "region_id",
+                foreignKey: "id",
+                alias: "product_variant_link",
+                isList: false,
+              },
+            },
+          ],
+        })
+      })
+
       it("should flag deleteCascade in the link definition", async () => {
         const currencyLinks = CurrencyModule.linkable
         const regionLinks = RegionModule.linkable
diff --git a/packages/core/utils/src/modules-sdk/define-link.ts b/packages/core/utils/src/modules-sdk/define-link.ts
index 2713ec85c7..2c046f0412 100644
--- a/packages/core/utils/src/modules-sdk/define-link.ts
+++ b/packages/core/utils/src/modules-sdk/define-link.ts
@@ -1,5 +1,5 @@
 import { LinkModulesExtraFields, ModuleJoinerConfig } from "@medusajs/types"
-import { isObject, pluralize, toPascalCase } from "../common"
+import { camelToSnakeCase, isObject, pluralize, toPascalCase } from "../common"
 import { composeLinkName } from "../link"
 
 export const DefineLinkSymbol = Symbol.for("DefineLink")
@@ -74,7 +74,7 @@ function prepareServiceConfig(input: DefineLinkInputSource) {
 
     serviceConfig = {
       key: source.linkable,
-      alias: source.field,
+      alias: camelToSnakeCase(source.field),
       primaryKey: source.primaryKey,
       isList: false,
       deleteCascade: false,
@@ -87,7 +87,7 @@ function prepareServiceConfig(input: DefineLinkInputSource) {
 
     serviceConfig = {
       key: source.linkable,
-      alias: source.field,
+      alias: camelToSnakeCase(source.field),
       primaryKey: source.primaryKey,
       isList: input.isList ?? false,
       deleteCascade: input.deleteCascade ?? false,
@@ -106,6 +106,14 @@ function prepareServiceConfig(input: DefineLinkInputSource) {
   return serviceConfig
 }
 
+/**
+ * Generate a ModuleJoinerConfig for the link definition on the fly.
+ * All naming, aliases etc are following our conventional naming.
+ *
+ * @param leftService
+ * @param rightService
+ * @param linkServiceOptions
+ */
 export function defineLink(
   leftService: DefineLinkInputSource,
   rightService: DefineLinkInputSource,