diff --git a/src/Microsoft.AspNet.Identity.EntityFramework/project.json b/src/Microsoft.AspNet.Identity.EntityFramework/project.json
index 76e2fa0ede..1254ee6109 100644
--- a/src/Microsoft.AspNet.Identity.EntityFramework/project.json
+++ b/src/Microsoft.AspNet.Identity.EntityFramework/project.json
@@ -6,7 +6,9 @@
   },
   "frameworks": {
     "dnx451": {
-      "dependencies": { }
+      "frameworkAssemblies": {
+        "System.Threading.Tasks": ""
+      }
     },
     "dnxcore50": {
       "dependencies": {