diff --git a/src/common/fast-path.js b/src/common/fast-path.js
index f7f32514..44a65133 100644
--- a/src/common/fast-path.js
+++ b/src/common/fast-path.js
@@ -320,6 +320,7 @@ FastPath.prototype.needsParens = function(options) {
         case "AwaitExpression":
         case "TSAsExpression":
         case "TSNonNullExpression":
+        case "UpdateExpression":
           return true;
 
         case "MemberExpression":
diff --git a/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap b/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap
index 73a1f83f..014f93fe 100644
--- a/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/typescript_as/__snapshots__/jsfmt.spec.js.snap
@@ -24,6 +24,7 @@ const state = JSON.stringify({
 } as State);
 
 (foo.bar as Baz) = [bar];
+(foo.bar as any)++;
 
 (bValue as boolean) ? 0 : -1;
 <boolean>bValue ? 0 : -1;
@@ -59,6 +60,7 @@ const state = JSON.stringify({
 } as State);
 
 (foo.bar as Baz) = [bar];
+(foo.bar as any)++;
 
 (bValue as boolean) ? 0 : -1;
 <boolean>bValue ? 0 : -1;
diff --git a/tests/typescript_as/as.js b/tests/typescript_as/as.js
index 1bedea90..464285c0 100644
--- a/tests/typescript_as/as.js
+++ b/tests/typescript_as/as.js
@@ -21,6 +21,7 @@ const state = JSON.stringify({
 } as State);
 
 (foo.bar as Baz) = [bar];
+(foo.bar as any)++;
 
 (bValue as boolean) ? 0 : -1;
 <boolean>bValue ? 0 : -1;