diff --git a/lib/mkdirp-manual.js b/lib/mkdirp-manual.js
index 703b3f5..2eb18cd 100644
--- a/lib/mkdirp-manual.js
+++ b/lib/mkdirp-manual.js
@@ -16,7 +16,7 @@ const mkdirpManual = (path, opts, made) => {
     if (er.code === 'ENOENT')
       return mkdirpManual(parent, opts)
         .then(made => mkdirpManual(path, opts, made))
-    if (er.code !== 'EEXIST')
+    if (er.code !== 'EEXIST' && er.code !== 'EROFS')
       throw er
     return opts.statAsync(path).then(st => {
       if (st.isDirectory())
@@ -50,7 +50,7 @@ const mkdirpManualSync = (path, opts, made) => {
   } catch (er) {
     if (er.code === 'ENOENT')
       return mkdirpManualSync(path, opts, mkdirpManualSync(parent, opts, made))
-    if (er.code !== 'EEXIST')
+    if (er.code !== 'EEXIST' && er.code !== 'EROFS')
       throw er
     try {
       if (!opts.statSync(path).isDirectory())
diff --git a/test/mkdirp-manual.js b/test/mkdirp-manual.js
index c252e21..b19c8d7 100644
--- a/test/mkdirp-manual.js
+++ b/test/mkdirp-manual.js
@@ -62,6 +62,26 @@ t.test('mkdirpManual / just calls implementation', t => {
   t.end()
 })
 
+t.test('read-only file system, still succeed if dir exists', t => {
+  const dir = t.testdir({ foo: {} })
+  const opt = {
+    stat,
+    statAsync,
+    statSync,
+    mkdir,
+    mkdirAsync: () => Promise.reject(Object.assign(new Error('EROFS'), {
+      code: 'EROFS',
+    })),
+    mkdirSync: () => {
+      throw Object.assign(new Error('EROFS'), {
+        code: 'EROFS',
+      })
+    },
+  }
+  t.equal(mkdirpManualSync(`${dir}/foo`, opt), undefined)
+  return mkdirpManual(`${dir}/foo`, opt).then(made => t.equal(made, undefined))
+})
+
 t.test('recurse and return first dir made', t => {
   const dir = t.testdir()
   const opt = {