diff --git a/samples/StaticFileSample/project.json b/samples/StaticFileSample/project.json
index 34268fc0b7..e1972b5533 100644
--- a/samples/StaticFileSample/project.json
+++ b/samples/StaticFileSample/project.json
@@ -6,7 +6,7 @@
     "Microsoft.AspNet.StaticFiles": ""
   },
   "frameworks": {
-    "net45": {
+    "aspnet50": {
     },
     "aspnetcore50": {
         "dependencies": {
diff --git a/src/Microsoft.AspNet.StaticFiles/SendFileMiddleware.cs b/src/Microsoft.AspNet.StaticFiles/SendFileMiddleware.cs
index 5da1397b8d..92b15fc92b 100644
--- a/src/Microsoft.AspNet.StaticFiles/SendFileMiddleware.cs
+++ b/src/Microsoft.AspNet.StaticFiles/SendFileMiddleware.cs
@@ -81,7 +81,7 @@ namespace Microsoft.AspNet.StaticFiles
                     throw new ArgumentOutOfRangeException("length", length, string.Empty);
                 }
 
-#if NET45
+#if ASPNET50
                 Stream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, 1024 * 64,
                     FileOptions.Asynchronous | FileOptions.SequentialScan);
 #else
diff --git a/src/Microsoft.AspNet.StaticFiles/project.json b/src/Microsoft.AspNet.StaticFiles/project.json
index 4dca476aef..680fa40d27 100644
--- a/src/Microsoft.AspNet.StaticFiles/project.json
+++ b/src/Microsoft.AspNet.StaticFiles/project.json
@@ -6,7 +6,7 @@
     "Microsoft.AspNet.HttpFeature": "1.0.0-*"
   },
   "frameworks": {
-    "net45": {},
+    "aspnet50": {},
     "aspnetcore50": {
       "dependencies": {
         "System.Collections": "4.0.10.0",
diff --git a/test/Microsoft.AspNet.StaticFiles.Tests/Project.json b/test/Microsoft.AspNet.StaticFiles.Tests/Project.json
index f78ddfc72e..573b786ea0 100644
--- a/test/Microsoft.AspNet.StaticFiles.Tests/Project.json
+++ b/test/Microsoft.AspNet.StaticFiles.Tests/Project.json
@@ -11,7 +11,7 @@
     "test": "Xunit.KRunner"
   },
   "frameworks": {
-    "net45": { 
+    "aspnet50": { 
       "dependencies": {
         "Shouldly": "1.1.1.1",
         "System.Runtime": ""