diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 0e2118af52a..f0685b7372e 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -6603,10 +6603,7 @@ namespace ts {
                         const start = scanner.getStartPos();
                         let children: JSDocParameterTag[];
                         while (child = tryParse(() => parseChildParameterOrPropertyTag(PropertyLikeParse.Parameter, name))) {
-                            if (!children) {
-                                children = [];
-                            }
-                            children.push(child);
+                            children = append(children, child);
                         }
                         if (children) {
                             jsdocTypeLiteral = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, start);
@@ -6723,10 +6720,7 @@ namespace ts {
                                 }
                             }
                             else {
-                                if (!jsdocTypeLiteral.jsDocPropertyTags) {
-                                    jsdocTypeLiteral.jsDocPropertyTags = [] as MutableNodeArray<JSDocPropertyTag>;
-                                }
-                                (jsdocTypeLiteral.jsDocPropertyTags as MutableNodeArray<JSDocPropertyTag>).push(child);
+                                jsdocTypeLiteral.jsDocPropertyTags = append(jsdocTypeLiteral.jsDocPropertyTags as MutableNodeArray<JSDocPropertyTag>, child);
                             }
                         }
                         if (jsdocTypeLiteral) {