diff --git a/src/fast-path.js b/src/fast-path.js
index 9aab6ad4b..be5bc1ef4 100644
--- a/src/fast-path.js
+++ b/src/fast-path.js
@@ -299,6 +299,7 @@ FastPath.prototype.needsParens = function(options) {
           return name === "callee" && parent.callee === node;
 
         case "ClassDeclaration":
+        case "TSAbstractClassDeclaration":
           return name === "superClass" && parent.superClass === node;
         case "TSTypeAssertionExpression":
         case "TaggedTemplateExpression":
diff --git a/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap b/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap
index 750938dba..25d5bea96 100644
--- a/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap
@@ -8,6 +8,7 @@ this.isTabActionBar((e.target || e.srcElement) as HTMLElement);
 start + (yearSelectTotal as number)
 scrollTop > (visibilityHeight as number)
 export default class Column<T> extends (RcTable.Column as React.ComponentClass<ColumnProps<T>>) {}
+export abstract class MobxTypedForm extends (Form as { new (): any }) {}
 ({}) as {};
 function*g() {
   const test = (yield 'foo') as number;
@@ -39,6 +40,7 @@ scrollTop > (visibilityHeight as number);
 export default class Column<T> extends (RcTable.Column as React.ComponentClass<
   ColumnProps<T>
 >) {}
+export abstract class MobxTypedForm extends (Form as { new (): any }) {}
 ({} as {});
 function* g() {
   const test = (yield "foo") as number;
diff --git a/tests/typescript_as/as.js b/tests/typescript_as/as.js
index e12cbc1ee..b74f5f8a6 100644
--- a/tests/typescript_as/as.js
+++ b/tests/typescript_as/as.js
@@ -5,6 +5,7 @@ this.isTabActionBar((e.target || e.srcElement) as HTMLElement);
 start + (yearSelectTotal as number)
 scrollTop > (visibilityHeight as number)
 export default class Column<T> extends (RcTable.Column as React.ComponentClass<ColumnProps<T>>) {}
+export abstract class MobxTypedForm extends (Form as { new (): any }) {}
 ({}) as {};
 function*g() {
   const test = (yield 'foo') as number;