diff --git a/src/server/project.ts b/src/server/project.ts
index 92f1d097b3..9a4e7ada96 100644
--- a/src/server/project.ts
+++ b/src/server/project.ts
@@ -267,15 +267,6 @@ namespace ts.server {
             }
         }
 
-        saveTo(filename: NormalizedPath, tmpfilename: NormalizedPath) {
-            const script = this.projectService.getScriptInfoForNormalizedPath(filename);
-            if (script) {
-                Debug.assert(script.isAttached(this));
-                const snap = script.snap();
-                this.projectService.host.writeFile(tmpfilename, snap.getText(0, snap.getLength()));
-            }
-        }
-
         reloadScript(filename: NormalizedPath): boolean {
             const script = this.projectService.getScriptInfoForNormalizedPath(filename);
             if (script) {
diff --git a/src/server/scriptInfo.ts b/src/server/scriptInfo.ts
index 7ab6bc7e7e..901e247df6 100644
--- a/src/server/scriptInfo.ts
+++ b/src/server/scriptInfo.ts
@@ -110,6 +110,11 @@ namespace ts.server {
             this.markContainingProjectsAsDirty();
         }
 
+        saveTo(fileName: string) {
+            const snap = this.snap();
+            this.host.writeFile(fileName, snap.getText(0, snap.getLength()));
+        }
+
         reloadFromFile() {
             this.svc.reloadFromFile(this.fileName);
             this.markContainingProjectsAsDirty();
diff --git a/src/server/session.ts b/src/server/session.ts
index 88676aae6a..739446b18c 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -1015,12 +1015,9 @@ namespace ts.server {
         }
 
         private saveToTmp(fileName: string, tempFileName: string) {
-            const file = toNormalizedPath(fileName);
-            const tmpfile = toNormalizedPath(tempFileName);
-
-            const project = this.projectService.getDefaultProjectForFile(file);
-            if (project) {
-                project.saveTo(file, tmpfile);
+            const scriptInfo = this.projectService.getScriptInfo(fileName);
+            if (scriptInfo) {
+                scriptInfo.saveTo(tempFileName);
             }
         }