diff --git a/releases/dotnetfx.json b/releases/dotnetfx.json
index abbf0c2f..414ca1c2 100644
--- a/releases/dotnetfx.json
+++ b/releases/dotnetfx.json
@@ -42,8 +42,8 @@
       "name": "4.0",
       "eol": "2016-01-12"
     },
-    "3.5 SP1": {
-      "name": "3.5 SP1",
+    "3.5-sp1": {
+      "name": "3.5-sp1",
       "eol": "2029-01-09"
     }
   },