diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index c5eecd19d04..9ad9067d6fa 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -658,7 +658,7 @@ module ts {
     // from this SourceFile that are being held onto may change as a result (including 
     // becoming detached from any SourceFile).  It is recommended that this SourceFile not
     // be used once 'update' is called on it.
-    export function update(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange): SourceFile {
+    export function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange): SourceFile {
         if (textChangeRangeIsUnchanged(textChangeRange)) {
             // if the text didn't change, then we can just return our current source file as-is.
             return sourceFile;
diff --git a/src/services/services.ts b/src/services/services.ts
index 79a652bb094..1b94899a1f5 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1587,7 +1587,7 @@ module ts {
             if (version !== sourceFile.version || isOpen != sourceFile.isOpen) {
                 // Once incremental parsing is ready, then just call into this function.
                 if (!disableIncrementalParsing) {
-                    var newSourceFile = update(sourceFile, scriptSnapshot.getText(0, scriptSnapshot.getLength()), textChangeRange);
+                    var newSourceFile = updateSourceFile(sourceFile, scriptSnapshot.getText(0, scriptSnapshot.getLength()), textChangeRange);
                     setSourceFileFields(newSourceFile, scriptSnapshot, version, isOpen);
                     return newSourceFile;
                 }