diff --git a/src/fast-path.js b/src/fast-path.js
index 9ec8f0606..2ce4c9cce 100644
--- a/src/fast-path.js
+++ b/src/fast-path.js
@@ -329,6 +329,9 @@ FPp.needsParens = function(assumeExpressionContext) {
         && name === "object"
         && parent.object === node;
 
+    case "NumericLiteral":
+      return parent.type === "MemberExpression";
+
     case "AssignmentExpression":
     case "ConditionalExpression":
       switch (parent.type) {
diff --git a/tests/literal/__snapshots__/jsfmt.spec.js.snap b/tests/literal/__snapshots__/jsfmt.spec.js.snap
index 54fe861d5..655ae21ee 100644
--- a/tests/literal/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/literal/__snapshots__/jsfmt.spec.js.snap
@@ -84,6 +84,11 @@ function test4(flip_times: number): number {
   }
   return x;
 }
+
+// parentheses around numeric literal should be preserved
+function test5(): string {
+  return (100).toString();
+}
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 function test1(x: number): number {
   return -x;
@@ -108,5 +113,10 @@ function test4(flip_times: number): number {
   }
   return x;
 }
+
+// parentheses around numeric literal should be preserved
+function test5(): string {
+  return (100).toString();
+}
 "
 `;
diff --git a/tests/literal/number.js b/tests/literal/number.js
index 1ec529919..9765a13eb 100644
--- a/tests/literal/number.js
+++ b/tests/literal/number.js
@@ -21,3 +21,8 @@ function test4(flip_times: number): number {
   }
   return x;
 }
+
+// parentheses around numeric literal should be preserved
+function test5(): string {
+  return (100).toString();
+}