diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index f61d4403eece6..cfd234753263b 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -1353,10 +1353,21 @@ module ts {
                 emitToken(SyntaxKind.CloseBraceToken, node.clauses.end);
             }
 
-            function isOnSameLine(node1: Node, node2: Node) {
+            function isOnSameLine(node1: Node, node2: Node): boolean {
                 return getLineOfLocalPosition(skipTrivia(currentSourceFile.text, node1.pos)) === getLineOfLocalPosition(skipTrivia(currentSourceFile.text, node2.pos));
             }
 
+            function isCaseFallThru(node: CaseOrDefaultClause): boolean {
+                var isBreakExists: boolean = false ;
+                isBreakExists = forEach(node.statements, node => {
+                                    if (node.kind === SyntaxKind.BreakStatement) {
+                                        return true;
+                                    }
+                                });
+                
+                return ( node.statements.length === 0 || !isBreakExists );
+            }
+
             function emitCaseOrDefaultClause(node: CaseOrDefaultClause) {
                 if (node.kind === SyntaxKind.CaseClause) {
                     write("case ");
@@ -1376,6 +1387,13 @@ module ts {
                     emitLines(node.statements);
                     decreaseIndent();
                 }
+
+                if ( isCaseFallThru(node) )
+                {
+                    writeLine();
+                    write(" /* falls through */ ");
+                    writeLine();
+                }
             }
 
             function emitThrowStatement(node: ThrowStatement) {