diff --git a/packages/babel-plugin-transform-runtime/src/index.js b/packages/babel-plugin-transform-runtime/src/index.js
index a9d0fd350deb..448d46f449c9 100644
--- a/packages/babel-plugin-transform-runtime/src/index.js
+++ b/packages/babel-plugin-transform-runtime/src/index.js
@@ -10,9 +10,9 @@ import { typeAnnotationToString } from "./helpers";
 
 function resolveAbsoluteRuntime(moduleName: string, dirname: string) {
   try {
-    return path.dirname(
-      resolve.sync(`${moduleName}/package.json`, { basedir: dirname }),
-    );
+    return path
+      .dirname(resolve.sync(`${moduleName}/package.json`, { basedir: dirname }))
+      .replace(/\\/g, "/");
   } catch (err) {
     if (err.code !== "MODULE_NOT_FOUND") throw err;
 
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/input.js b/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/input.js
new file mode 100644
index 000000000000..42f8907ec4c7
--- /dev/null
+++ b/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/input.js
@@ -0,0 +1,9 @@
+async function test () {
+  console.log('test')
+}
+
+async function main () {
+  console.log(await test())
+}
+
+main()
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/options.json b/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/options.json
new file mode 100644
index 000000000000..de2d6991e33e
--- /dev/null
+++ b/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/options.json
@@ -0,0 +1,23 @@
+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "corejs": 3,
+        "useBuiltIns": "entry"
+      }
+    ]
+  ],
+  "plugins": [
+    [
+      "transform-runtime",
+      {
+        "regenerator": false,
+        "corejs": false,
+        "helpers": true,
+        "useESModules": true,
+        "absoluteRuntime": true
+      }
+    ]
+  ]
+}
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/output.js b/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/output.js
new file mode 100644
index 000000000000..323f1271c204
--- /dev/null
+++ b/packages/babel-plugin-transform-runtime/test/fixtures/windows/absoluteRuntime/output.js
@@ -0,0 +1,54 @@
+var _asyncToGenerator = require("<CWD>/packages/babel-plugin-transform-runtime/node_modules/@babel/runtime/helpers/asyncToGenerator");
+
+function test() {
+  return _test.apply(this, arguments);
+}
+
+function _test() {
+  _test = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee() {
+    return regeneratorRuntime.wrap(function _callee$(_context) {
+      while (1) {
+        switch (_context.prev = _context.next) {
+          case 0:
+            console.log('test');
+
+          case 1:
+          case "end":
+            return _context.stop();
+        }
+      }
+    }, _callee);
+  }));
+  return _test.apply(this, arguments);
+}
+
+function main() {
+  return _main.apply(this, arguments);
+}
+
+function _main() {
+  _main = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee2() {
+    return regeneratorRuntime.wrap(function _callee2$(_context2) {
+      while (1) {
+        switch (_context2.prev = _context2.next) {
+          case 0:
+            _context2.t0 = console;
+            _context2.next = 3;
+            return test();
+
+          case 3:
+            _context2.t1 = _context2.sent;
+
+            _context2.t0.log.call(_context2.t0, _context2.t1);
+
+          case 5:
+          case "end":
+            return _context2.stop();
+        }
+      }
+    }, _callee2);
+  }));
+  return _main.apply(this, arguments);
+}
+
+main();
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/windows/options.json b/packages/babel-plugin-transform-runtime/test/fixtures/windows/options.json
new file mode 100644
index 000000000000..2163a20634fe
--- /dev/null
+++ b/packages/babel-plugin-transform-runtime/test/fixtures/windows/options.json
@@ -0,0 +1,3 @@
+{
+  "os": ["win32"]
+}