diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index a4ff544a13..2ebfe367d3 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2591,6 +2591,13 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, Promi
                     }
                     else {
                         emit(node.left);
+                        // Add indentation before emit the operator if the operator is on different line
+                        // For example:
+                        //      3
+                        //      + 2;
+                        //   emitted as
+                        //      3
+                        //          + 2;
                         let indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== SyntaxKind.CommaToken ? " " : undefined);
                         write(tokenToString(node.operatorToken.kind));
                         let indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");