diff --git a/runsc/boot/config.go b/runsc/boot/config.go
index 6c69a7c38..bc392deb3 100644
--- a/runsc/boot/config.go
+++ b/runsc/boot/config.go
@@ -76,7 +76,7 @@ const (
 // MakeFileAccessType converts type from string.
 func MakeFileAccessType(s string) (FileAccessType, error) {
 	switch s {
-	case "proxy":
+	case "proxy-shared":
 		return FileAccessProxy, nil
 	case "proxy-exclusive":
 		return FileAccessProxyExclusive, nil
@@ -90,7 +90,7 @@ func MakeFileAccessType(s string) (FileAccessType, error) {
 func (f FileAccessType) String() string {
 	switch f {
 	case FileAccessProxy:
-		return "proxy"
+		return "proxy-shared"
 	case FileAccessProxyExclusive:
 		return "proxy-exclusive"
 	case FileAccessDirect:
diff --git a/runsc/main.go b/runsc/main.go
index b36100cca..0a2cbca6c 100644
--- a/runsc/main.go
+++ b/runsc/main.go
@@ -109,6 +109,10 @@ func main() {
 		cmd.Fatalf("%v", err)
 	}
 
+	if fsAccess == boot.FileAccessProxy && *overlay {
+		cmd.Fatalf("overlay flag is incompatible with proxy-shared file access")
+	}
+
 	netType, err := boot.MakeNetworkType(*network)
 	if err != nil {
 		cmd.Fatalf("%v", err)
@@ -119,10 +123,6 @@ func main() {
 		cmd.Fatalf("%v", err)
 	}
 
-	if *fileAccess == "proxy" && *overlay {
-		cmd.Fatalf("overlay flag is incompatible with file-access=proxy")
-	}
-
 	// Create a new Config from the flags.
 	conf := &boot.Config{
 		RootDir:        *rootDir,