diff --git a/packages/core/utils/src/modules-sdk/medusa-service.ts b/packages/core/utils/src/modules-sdk/medusa-service.ts
index ad0018a400..ac9a2e3c11 100644
--- a/packages/core/utils/src/modules-sdk/medusa-service.ts
+++ b/packages/core/utils/src/modules-sdk/medusa-service.ts
@@ -68,8 +68,10 @@ type ModelConfigurationsToConfigTemplate<T extends TEntityEntries> = {
     dto: T[Key] extends Constructor<any> ? InstanceType<T[Key]> : any
     create: any
     update: any
-    singular: T[Key] extends { singular: string } ? T[Key]["singular"] : string
-    plural: T[Key] extends { plural: string } ? T[Key]["plural"] : string
+    singular: T[Key] extends { singular: string } ? T[Key]["singular"] : Key
+    plural: T[Key] extends { plural: string }
+      ? T[Key]["plural"]
+      : Pluralize<Key & string>
   }
 }
 
@@ -107,7 +109,7 @@ type ExtractKeysFromConfig<EntitiesConfig> = EntitiesConfig extends {
   : keyof EntitiesConfig
 
 export type AbstractModuleService<
-  TEntitiesDtoConfig extends EntitiesConfigTemplate
+  TEntitiesDtoConfig extends Record<string, any>
 > = {
   [TEntityName in keyof TEntitiesDtoConfig as `retrieve${ExtractSingularName<
     TEntitiesDtoConfig,