diff --git a/source/core/index.ts b/source/core/index.ts
index 7404ba5..a8a1561 100644
--- a/source/core/index.ts
+++ b/source/core/index.ts
@@ -532,10 +532,6 @@ export default class Request extends Duplex implements RequestEvents<Request> {
 							}
 						} else {
 							retryAfter *= 1000;
-
-							if (retryAfter <= 0) {
-								retryAfter = 1;
-							}
 						}
 					}
 
diff --git a/test/retry.ts b/test/retry.ts
index ce62069..0e50659 100644
--- a/test/retry.ts
+++ b/test/retry.ts
@@ -304,27 +304,6 @@ test('retries on 503 without Retry-After header', withServer, async (t, server,
 	t.is(retryCount, 1);
 });
 
-test('retries immediately on non-positive numeric Retry-After', withServer, async (t, server, got) => {
-	server.get('/', (_request, response) => {
-		response.writeHead(503, {
-			'Retry-After': 0,
-		});
-		response.end();
-	});
-
-	const start = Date.now();
-	const {statusCode, retryCount} = await got({
-		throwHttpErrors: false,
-		retry: {
-			limit: 2,
-		},
-	});
-
-	t.is(statusCode, 503);
-	t.is(retryCount, 2);
-	t.true(Date.now() - start < 1000);
-});
-
 test('doesn\'t retry on streams', withServer, async (t, server, got) => {
 	server.get('/', () => {});